Nutrition reproduction interaction in pasture-based systems: Is nutrition a factor in reproductive failure?

Animal Production Science

Volumn 51, Issue 12, 2011, Pages 1045-1066

  Roche, J R ^a   Burke, C R ^a   Meier, S ^a   Walker, C G ^a  

^a DAIRYNZ   (New Zealand)

Author keywords

diet; energy balance; fatty acids; non structural carbohydrates; protein.

Indexed keywords

BREEDING SEASON; CARBOHYDRATE; CATTLE; DAIRY FARMING; ENERGY BALANCE; FATTY ACID; FERTILITY; FOOD QUALITY; FORAGE; MILK PRODUCTION; PASTURE; PROTEIN; REPRODUCTIVE BIOLOGY; REPRODUCTIVE PRODUCTIVITY;

BOS;

EID: 82155188471     PISSN: 18360939     EISSN: None     Source Type: Journal    
DOI: 10.1071/AN10162     Document Type: Review

References (189)

1. Adamiak SJ, Mackie K, Watt RG, Webb R, Sinclair KD (2005) Impact of nutrition on oocyte quality: cumulative effects of body composition and diet leading to hyperinsulinemia in cattle.Biology of Reproduction 73, 918-926.doi:10.1095/biolreprod.105.041483 (Pubitemid 41507494)
2. Adamiak SJ, Powell K, Rooke JA, Webb R, Sinclair KD (2006) Body composition, dietary carbohydrates and fatty acids determine post-fertilisation development of bovine oocytes in vitro.Reproduction (Cambridge, England) 131, 247-258.doi:10.1530/rep.1.00871 (Pubitemid 43273684)
3. ARC (1980) 'The nutrient requirements of ruminant livestock.' CAB International: Wallingford).
4. Ambrose DJ, Kastelic JP, CorbettR,Pitney PA, Petit HV, Small JA, Zalkovic P (2006) Lower pregnancy losses in lactating dairy cows fed a diet enriched in alpha-linolenic acid.Journal of Dairy Science 89, 3066-3074.doi:10.3168/jds. S0022-0302(06)72581-4 (Pubitemid 44197224)
5. Arunvipas P, Leger ER, VanLeeuwen JA, Dohoo IR, Keefe GP (2003) The effect of nutritional and management factors and milk urea nitrogen and management factors and milk urea nitrogen levels on reproductive performance in Canadian dairy herds.In '10th Symposium of the International Society for Veterinary Epidemiology and Economics'.pp.258-261.(International Symposia on Veterinary Epidemiology and Economics: Vina Del Mar, Chile)
6. Bargo F, Muller LD, Kolver ES, Delahoy JE (2003) Invited review: production and digestion of supplemented dairy cows on pasture.Journal of Dairy Science 86, 1-42.doi:10.3168/jds.S0022-0302(03) 73581-4 (Pubitemid 39067158)
7. Barton BA, Rosario HA, Anderson GW, Grindle BP, Carroll DJ (1996) Effects of dietary crude protein, breed, parity, and health status on the fertility of dairy cows.Journal of Dairy Science 79, 2225-2236.doi:10.3168/jds.S0022-0302(96) 76599-2 (Pubitemid 126429023)
8. Beam SW (1995) Follicular development in postpartum cattle: effects of energy balance and dietary lipid.PhD Dissertation, Cornell University, Ithaca, NY.
9. Beam SW, Butler WR (1997) Energy balance and ovarian follicle development prior to the first ovulation postpartum in dairy cows receiving three levels of dietary fat.Biology of Reproduction 56, 133-142.doi:10.1095/biolreprod56.1.133 (Pubitemid 27024170)
10. Beam SW, Butler WR (1999) Effects of energy balance on follicular development and first ovulation in postpartum dairy cows.Journal of Reproduction and Fertility.Supplement 54, 411-424.
11. Berry DP, Buckley F, Dillon P, Evans RD, Rath M, Veerkamp RF (2003) Genetic relationships among body condition score, body weight, milk yield, and fertilityindairy cows.Journal of DairyScience86, 2193-2204.doi:10.3168/jds. S0022-0302(03)73809-0 (Pubitemid 39067082)
12. Berry DP, Roche JR, Coffee MP (2008) Body condition score and fertility-more than just a feeling.In 'Fertility in dairy cows'.(Eds MD Royal, NC Friggens, RF Smith) pp.107-118.(British Society of Animal Science: Pencuik, Scotland)
13. Beukes PC, Burke CR, Levy G, Tiddy RM (2010) Using a whole farm model to determine the impacts of mating management on the profitability of pasture-based dairy farms.Animal Reproduction Science 121, 46-54.doi:10.3168/jds.S0022- 0302(06)72432-8
14. Bilby TR,BlockJ,doAmaralBC,SaFilhoO,SilvestreFT,HansenPJ, Staples CR, Thatcher WW (2006a) Effects of dietary unsaturated fatty acids on oocyte quality and follicular development in lactating dairy cows in summer.Journal of Dairy Science 89, 3891-3903.doi:10.3168/jds.S0022-0302(06)72432-8 (Pubitemid 44505362)
15. Bilby TR, Jenkins T, Staples CR, Thatcher WW (2006b) Pregnancy, bovine somatotropin, and dietary n-3 fatty acids in lactating dairy cows: III.Fatty acid distribution.Journal of Dairy Science 89, 3386-3399.doi:10.3168/jds.S0022- 0302(06)72375-X (Pubitemid 44305981)
16. Blanchard T, Ferguson J, Love L, Takeda T, Henderson B, Hasler J, Chalupa W (1990) Effect of dietary crude-protein type on fertilization and embryo quality in dairy cattle.American Journal of Veterinary Research 51, 905-908.
17. Block J, Fischer-Brown AE, Rodina TM, Ealy AD, Hansen PJ (2007) The effect of in vitro treatment of bovine embryos with IGF-1 on subsequent development in utero to Day 14 of gestation.Theriogenology 68, 153-161.doi:10.1016/j.theriogenology.2007.04.045 (Pubitemid 46898612)
18. Bramley E, Lean IJ, Fulkerson WJ, Stevenson MA, Rabiee AR, Costa ND (2008) The definition of acidosis in dairy herds predominantly fed on pasture and concentrates.Journal of Dairy Science 91, 308-321.doi:10.3168/jds.2006-601 (Pubitemid 351455846)
19. Breier BH, Gluckman PD, Bass JJ (1988) The somatotrophic axis in young steers: influence of nutritional status and oestradiol-17 beta on hepatic high-and low-affinity somatotrophic binding sites.The Journal of Endocrinology 116, 169-177.doi:10.1677/joe.0.1160169 (Pubitemid 18033280)
20. Brosh A, Henkin Z, Ungar ED, Dolev A, Orlov A, Yehuda Y, Aharoni Y (2006) Energy cost of cows' grazing activity: use of the heart rate method and the Global Positioning System for direct field estimation.Journal of Animal Science 84, 1951-1967.doi:10.2527/jas.2005-315 (Pubitemid 44033985)
21. Burke CR, Roche JR (2007) Effects of pasture feeding during the periparturient period on postpartum anovulation in grazed dairy cows.Journal of Dairy Science 90, 4304-4312.doi:10.3168/jds.2006-788 (Pubitemid 350045208)
22. Burke CR, McDougall S, Mcmillian KL (1995) Effects of breed and calving liveweight on postpartum ovarian activity in pasture-fed heifers.Proceedings of the New Zealand Society of Animal Production55, 76-78.
23. Burke CR, Verkerk GA, MacMillan KL (1996) An attempt to create an 'anoestrous cow' model by restricting feed allowances in non-lactating cyclic cows.Proceedings of the New Zealand Society of Animal Production 56, 233-235.
24. Burke CR, Fowler C, Tiddy RM (2008) Building towards the InCalf programme for New Zealand.In 'Proceedings of Dairy Cattle Veterinarians Conference, 18-20 June 2008, Palmerston North, New Zealand'.(Ed.T Parkinson) pp.1-8.(Vetlearn: Wellington, New Zealand)
25. Burke CR, Kay JK, Phyn CWP, Meier S, Roche JR (2010a) Short communication: effects of dietary non-structural carbohydrate pre-and postpartum on reproduction of grazing dairy cows.Journal of Dairy Science 93, 1116-1125.doi:10.3168/jds.2009-2562
26. Burke CR, Williams YJ, Hofmann L, Kay JK, Phyn CV, Meier S (2010b) Effects of an acute feed restriction at the onset of the seasonal breeding period on reproductive performance and milk production in pasture-grazed dairy cows.Journal of Dairy Science 93, 1116-1125.doi:10.3168/jds.2009-2562
27. Butler WR (1998) Review: effect of protein nutrition on ovarian and uterine physiology in dairy cattle.Journal of Dairy Science 81, 2533-2539.doi:10.3168/jds.S0022-0302(98)70146-8
28. Butler ST, Pelton SH, Butler WR (2004) Insulin increases 17 beta-oestradiol productionby the dominant follicle of thefirst postpartum follicle wave in dairy cows.Reproduction (Cambridge, England) 127, 537-545.doi:10.1530/rep.1.00079 (Pubitemid 38745071)
29. Carruthers VB, Neil PG, Dalley DY (1997) Effect of altering the non-structural: structural carbohydrate ratio in a pasture diet on milk production and ruminal metabolites in cows in early and late lactation.Animal Science (Penicuik, Scotland) 64, 393-402.doi:10.1017/S1357729800015988
30. Cerri RL, Juchem SO, Chebel RC, Rutigliano HM, Bruno RG, Galvao KN, Thatcher WW, Santos JE (2009) Effect of fat source differingin fatty acid profile onmetabolic parameters, fertilization, and embryo quality in high-producing dairy cows.Journal of Dairy Science 92, 1520-1531.doi:10.3168/ jds.2008-1614
31. Chagas LM, Bass JJ, Blache D, Burke CR, Kay JK, Lindsay DR, Lucy MC, Martin GB, Meier S, Rhodes FM, Roche JR, Thatcher WW, Webb R (2007a) Invited review: new perspectives on the roles of nutrition and metabolic priorities in the subfertility of high-producing dairy cows.Journal of Dairy Science 90, 4022-4032.doi:10.3168/jds.2006-852 (Pubitemid 350063984)
32. Chagas LM, Gore PJ, Meier S, Macdonald KA, Verkerk GA (2007b) Effect of monopropylene glycol on luteinizing hormone, metabolites, and postpartum anovulatory intervals in primiparous dairy cows.Journal of Dairy Science90, 1168-1175.doi:10.3168/jds.S0022-0302(07)71603-X (Pubitemid 350045441)
33. Chagas LM, Tunon GE, Taufa VK, Burke CR, Waghorn GC (2010) Reproductive performance of pasture-fed dairy cows supplemented with monopropylene glycol.New Zealand Veterinary Journal 58, 17-22.doi:10.1080/00480169.2010.65056
34. Cheng Z, Robinson RS, Pushpakumara PG, Mansbridge RJ, Wathes DC (2001) Effect of dietary polyunsaturated fatty acids on uterine prostaglandin synthesis in the cow.The Journal of Endocrinology 171, 463-473.doi:10.1677/joe.0.1710463 (Pubitemid 34026361)
35. Cheng Z, Abayasekara DR, Wathes DC (2005) The effectofsupplementation with n-6 polyunsaturated fatty acids on 1-, 2-and 3-series prostaglandin F productionbyovineuterine epithelialcells.BiochimicaetBiophysicaActa 1736, 128-135. (Pubitemid 41262570)
36. Childs S, Carter F, Lynch CO, Sreenan JM, Lonergan P, Hennessy AA, Kenny DA (2008a) Embryo yield and quality following dietary supplementation of beef heifers with n-3 polyunsaturated fatty acids (PUFA).Theriogenology 70, 992-1003.doi:10.1016/j.theriogenology.2008.06.008
37. Childs S, Hennessy AA, Sreenan JM, Wathes DC, Cheng Z, Stanton C, Diskin MG, Kenny DA (2008b) Effect of level of dietary n-3 polyunsaturated fattyacidsupplementationonsystemicandtissuefattyacidconcentrations and on selected reproductive variables in cattle.Theriogenology 70, 595-611.doi:10.1016/j.theriogenology.2008.04.002
38. Coyne GS, Kenny DA, Childs S, Sreenan JM, Waters SM (2008) Dietary n-3 polyunsaturated fatty acids alter the expression of genes involved in prostaglandin biosynthesis in the bovine uterus.Theriogenology 70, 772-782.doi:10.1016/j.theriogenology.2008.05.048
39. CSIRO (2007) 'Nutrient requirements of domesticated ruminants.' (CSIRO Publishing: Melbourne)
40. Dalley DE, Roche JR, Grainger C, Moate PJ (1999) Dry matter intake, nutrient selection and milk production of dairy cows grazing rainfed perennial pastures at different herbage allowances in spring.Australian Journal of Experimental Agriculture 39, 923-931.doi:10.1071/EA99022 (Pubitemid 30124277)
41. Dawuda PM, Scaramuzzi RJ, Leese HJ, Hall CJ, Peters AR, Drew SB, Wathes DC (2002) Effect of timing of urea feeding on the yield and quality of embryos in lactating dairy cows.Theriogenology 58, 1443-1455.doi:10.1016/S0093-691X(02) 00973-1
42. De Vries MJ, VeerkampRF (2000) Energy balanceof dairy cattlein relation to milk production variables and fertility.Journal of Dairy Science 83, 62-69.doi:10.3168/jds.S0022-0302(00)74856-9
43. De Wit AA, Cesar ML, Kruip TA (2001) Effect of urea during in vitro maturation on nuclear maturation and embryo development of bovine cumulus-oocyte-complexes.Journal of Dairy Science 84, 1800-1804.doi:10.3168/jds. S0022-0302(01)74618-8 (Pubitemid 33620446)
44. Delaby L, Faverdin P, Michel G, Disenhaus C, Peyraud JL (2009) Effect of different feeding strategies on lactation performance of Holstein and Normande dairy cows.Animal 3, 891-905.doi:10.1017/S1751731109004212
45. Diskin MG (2008a) Reproductive management of dairy cows: a review (Part I).Irish Veterinary Journal 61, 326-332. (Pubitemid 351748499)
46. Diskin MG (2008b) Reproductive management of dairy cows: a review (Part II).Irish Veterinary Journal 61, 403-411. (Pubitemid 351897092)
47. Diskin MG, Mackey DR, Roche JF, Sreenan JM (2003) Effects of nutrition and metabolic status on circulating hormones and ovarian follicle development in cattle.Animal Reproduction Science 78, 345-370.doi:10.1016/S0378-4320(03)00099- X (Pubitemid 37096420)
48. Diskin MG, Murphy JJ, Sreenan JM (2006) Embryo survival in dairy cows managed under pastoral conditions.Animal Reproduction Science 96, 297-311.doi:10.1016/j.anireprosci.2006.08.008 (Pubitemid 44584598)
49. Doyle PT, Francis SA, Stockdale CR (2005) Associative effects between feeds when concentrate supplements are fed to grazing dairy cows: a review of likely impacts on metabolisable energy supply.Australian Journal of Agricultural Research 56, 1315-1329.doi:10.1071/AR05087 (Pubitemid 41798176)
50. Elrod CC, ButlerWR(1993) Reductionoffertility and alterationofuterine pH in heifers fed excess ruminally degradable protein.Journal of Animal Science 71, 694-701.
51. Elrod CC, Van Amburgh M, Butler WR (1993) Alterations of pH in response to increased dietary protein in cattle are unique to the uterus.Journal of Animal Science 71, 702-706.
52. Evans RD, Wallace M, Shalloo L, Garrick DJ, Dillon P (2006) Financial implications of recent declines in reproduction and survival of Holstein-Friesian cows in spring-calving Irish dairy herds.Agricultural Systems 89, 165-183.doi:10.1016/j.agsy.2005.08.008
53. Fenwick MA, Llewellyn S, Fitzpatrick R, Kenny DA, Murphy JJ, Patton J, Wathes DC (2008) Negative energy balance in dairy cows is associated with specific changes in IGF-binding protein expression in the oviduct.Reproduction (Cambridge, England) 135, 63-75.doi:10.1530/REP-07-0243
54. Ferguson JD, Chalupa W (1989) Impactofproteinnutritiononreproduction in dairy cows.Journal of Dairy Science 72, 746-766.doi:10.3168/jds.S0022-0302(89) 79168-2
55. Ferguson JD, Blanchard T, Galligan DT, Hoshall DC, Chalupa W (1988) Infertility in dairy cattle fed a high percentage of protein degradable in the rumen.Journal of the American Veterinary Association 192, 659-662.
56. Ferguson JD, Galligan DT, Blanchard T, Reeves M (1993) Serum urea nitrogen and conception rate: the usefulness of test information.Journal of Dairy Science 76, 3742-3746.doi:10.3168/jds.S0022-0302 (93)77716-4
57. Fouladi-Nashta AA, Gutierrez CG, Gong JG, Garnsworthy PC, Webb R (2007) Impact of dietary fatty acids on oocyte quality and development in lactating dairy cows.Biology of Reproduction 77, 9-17.doi:10.1095/biolreprod.106.058578 (Pubitemid 46986391)
58. Friggens NC, Berg P, Theilgaard P, Korsgaard IR, Ingvartsen KL, Lovendahl P, Jensen J (2007) Breed and parity effects on energy balance profiles through lactation: evidence of genetically driven body energy change.Journal of Dairy Science 90, 5291-5305.doi:10.3168/jds.2007-0173 (Pubitemid 351455418)
59. Friggens NC, Disenhaus C, Petit HV (2010) Nutritional sub-fertility in the dairy cow: towards improved reproductive management through a better biological understanding.Animal 4, 1197-1213.doi:10.1017/S1751731109991601
60. Fulkerson WJ, Wilkins J, Dobos RC, Hough GM, Goddard ME, Davison T (2001) Reproductive performance in Holstein-Friesian cows inrelation to genetic merit and level of feeding when grazing pasture.Animal Science (Penicuik, Scotland) 73, 397-406.
61. Garcia-Bojalil CM, Staples CR, Thatcher WW, DrostM(1994) Protein intake and development of ovarian follicles and embryos of superovulated nonlactating dairy cows.Journal of Dairy Science 77, 2537-2548.doi:10.3168/jds.S0022-0302(94) 77195-2
62. Garnsworthy PC, Sinclair KD, Webb R (2008) Integration of physiological mechanisms that influence fertility in dairy cows.Animal 2, 1144-1152.doi:10. 1017/S1751731108002358 (Pubitemid 351951463)
63. Garnsworthy PC, Fouladi-Nashta AA, Mann GE, Sinclair KD,Webb R (2009) Effect ofdietary-induced changes in plasma insulin concentrations during the early post partum period on pregnancy rate in dairy cows.Reproduction (Cambridge, England) 137, 759-768.doi:10.1530/REP-08-0488
64. Ginther OJ, Kot K, Kulick LJ, Martin S, Wiltbank MC (1996) Relationships between FSH and ovarian follicular waves during the last six months of pregnancy in cattle.Journal of Reproduction and Fertility 108, 271-279.doi:10.1530/jrf.0. 1080271
65. Gong JG, Lee WJ, Garnsworthy PC, Webb R (2002) Effectofdietary-induced increases in circulating insulin concentrations during the early postpartum periodonreproductive functionindairy cows.Reproduction (Cambridge, England) 123, 419-427.doi:10.1530/rep.0.1230419 (Pubitemid 34223888)
66. Grala TM, Lucy MC, Roche JR (2011) Somatotropic axis and concentrate supplementation in grazing dairy cows of genetically diverse origin.Journal of Dairy Science 94, 303-315.doi:10.3168/jds.2010-3773
67. Gregorini P, Clark CE, Jago JG, Glassey CB, McLeod KL, Romera AJ (2009) Restricting time at pasture: effects on dairy cow herbage intake, foraging behavior, hunger-related hormones, and metabolite concentration during the first grazing session.Journal of Dairy Science 92, 4572-4580.doi:10.3168/jds.2009- 2322
68. Grummer RR, Carroll DJ (1991) Effects of dietary fat on metabolic disorders and reproductive performance of dairy cattle.Journal of Animal Science 69, 3838-3852.
69. Gustafson H, Larsson K (1985) Embryonic mortality in heifers after artificial insemination and embryo transfer: differences between virgin and repeat breeder heifers.Research in Veterinary Science 39, 271-274.
70. Gwynne JT, Strauss JF (1982) The role of lipoproteins in steroidogenesis and cholesterol metabolism in steroidogenic glands.Endocrine Reviews 3, 299-329.doi:10.1210/edrv-3-3-299
71. Hafez ESE, Schein MW (1962) The behaviour of cattle.In 'Behaviour of domestic ruminants'.(Ed.ESE Hafez) pp.247-296.(Bailliere, Tindall and Cox Ltd, Great Britain: Covent Garden)
72. Hammon DS, Wang S, Holyoak GR (2000) Effects of ammonia during different stages of culture on development of in vitro produced bovine embryos.Animal Reproduction Science 59, 23-30.doi:10.1016/S0378-4320(00)00071-3 (Pubitemid 30257886)
73. Hansen PJ (1995) Interactions between the immune system and the ruminant conceptus.Journal of Reproduction and Fertility.Supplement 49, 69-82.
74. Harris BL, Kolver ES (2001) Review of Holsteinization on intensive pastoral dairy farming in New Zealand.Journal of Dairy Science 84(E.Suppl.), E56-E61.doi:10.3168/jds.S0022-0302(01)70197-X
75. Heravi Moussavi ARH, Gilbert RO, Overton TR, Bauman DE, Butler WR (2007) Effects of feeding fish meal and n-3 fatty acids on ovarian and uterine responses in early lactating dairy cows.Journal of Dairy Science 90, 145-154.doi:10.3168/jds.S0022-0302(07)72616-4 (Pubitemid 350042846)
76. Holmes W (1989) 'Grass.Its production and utilization.' 2nd edn.(British Grassland Society, Blackwell Scientific Publications: Oxford)
77. Horan B, Mee JF, Rath M, O'Connor P, Dillon P (2004) The effect of strain of Holstein-Friesiancow andfeeding systemonreproductive performance in seasonal-calving milk production systems.Animal Science (Penicuik, Scotland) 79, 453-467. (Pubitemid 40084447)
78. Hugentobler SA, Sreenan JM, Humpherson PG, Leese HJ, Diskin MG, Morris DG (2010) Effects of changes in the concentration of systemic progesterone on ions, amino acids and energy substrates in cattle oviduct and uterine fluid and blood.Reproduction, Fertility and Development 22, 684-694.doi:10.1071/RD09129
79. Jordan ER, Swanson LV(1979) Serum progesterone and luteinizing hormone in dairy cattle fed varying levels of crude protein.Journal of Animal Science 48, 1154-1158.
80. Jordan ER, Chapman TE, Holtan DW, Swanson LV (1983) Relationship of dietary crude protein to composition of uterine secretions and blood in high-producing postpartum dairy cows.Journal of Dairy Science 66, 1854-1862.doi:10.3168/jds.S0022-0302(83)82023-2
81. Juchem S, Cerri R, Villaseñor M, Galvão K, Bruno R, Rutigliano H, DePeters E, Silvestre F, Thatcher W, Santos J (2010) Supplementation with calcium saltsoflinoleic andtrans-octadecenoic acids improves fertilityof lactating dairy cows.Reproduction in Domestic Animals 45, 55-62.doi:10.1111/j.1439-0531.2008.01237.x
82. Kay JK, Roche JR, Kolver ES, Thomson NA, Baumgard LH (2005) A comparison between feeding systems (pasture and TMR) and the effect of vitamin E supplementation on plasma and milk fatty acid profiles in dairy cows.The Journal of Dairy Research 72, 322-332.doi:10.1017/S0022029905000944 (Pubitemid 41323115)
83. Kay JK, Roche JR, Moore CE, Baumgard LH (2006) Effects of dietary conjugated linoleic acid on production and metabolic parameters in transition dairy cows grazing fresh pasture.The Journal of Dairy Research 73, 367-377.doi:10.1017/S0022029906001944 (Pubitemid 44126943)
84. Kennedy J, Dillon P, O'Sullivan K, Buckley F, Rath M (2003) The effect of genetic merit for milk production and concentrate feeding level on the reproductive performance of Holstein-Friesian cows in a grass-based system.Animal Science (Penicuik, Scotland) 76, 297-308. (Pubitemid 36590127)
85. Kenny DA, Boland MP, Diskin MG, Sreenan JM (2001) Effect of pasture crude protein and fermentable energy supplementation on blood metabolite and progesterone concentrations and on embryo survival in heifers.Animal Science (Penicuik, Scotland) 73, 501-511. (Pubitemid 33390166)
86. Kenny DA, Boland MP, Diskin MG, Sreenan JM (2002) Effect of rumen degradable protein with or without fermentable carbohydrate supplementation on blood metabolites and embryo survival in cattle.Animal Science (Penicuik, Scotland) 74, 529-537. (Pubitemid 34853677)
87. Kimura K, Spate LD, Green MP, Roberts RM (2005) Effects of D-glucose concentration, D-fructose, and inhibitors of enzymes of the pentose phosphate pathway on the development and sex ratio of bovine blastocysts.Molecular Reproduction and Development 72, 201-207.doi:10.1002/mrd.20342 (Pubitemid 41099409)
88. Kolver ES, Macmillan KL (1994) Variation in selected blood plasma constituents during the postpartum and breeding periods in dairy cows.New Zealand Veterinary Journal 42, 161-166.doi:10.1080/00480169.1994.35813
89. Kolver ES, Muller LD (1998) Performance and nutrient intake of high producing Holstein cows consuming pasture or a total mixed ration.Journal of Dairy Science 81, 1403-1411.doi:10.3168/jds.S0022-0302 (98)75704-2 (Pubitemid 128448515)
90. Kolver ES, Roche JR, de Veth MJ, Thorne PL, Napper AR (2002) Total mixed rations versus pasture diets: evidence for a genotype · diet interaction in dairy cow performance.Proceedings of the New Zealand Society of Animal Production 62, 246-251.
91. Kolver ES, Roche JR, Burke CR, Aspin PW (2005) Influence of dairy cow genotype on milksolids, body condition and reproduction response to concentrate supplementation.Proceedings of the New Zealand Society of Animal Production 65, 46-52.
92. Kolver ES, Roche JR, Aspin PW ((2006) ) Plasma insulin, growth hormone, and IGF-1 concentrations of Holstein-Friesian cows of divergent genotype offered varying levels of concentrate in early lactation.Proceedings of the New Zealand Society of Animal Production 66, 403-408.
93. Larson MA, Kimura K, Kubisch HM, Roberts RM (2001) Sexual dimorphism among bovine embryos in their ability to make the transition to expanded blastocyst and in the expression of the signaling molecule IFN-tau.Proceedings of the National Academy of Sciences of the United States of America 98, 9677-9682.doi:10.1073/pnas.171305398 (Pubitemid 32769362)
94. Leroy JLMR, Opsomer G, Vliegher SD, Vanholder T, Goossens L, Geldhof A, Bols PEJ, Kruif AD, Soom AV (2005) Comparison of embryo quality in high-yielding dairy cows, in dairy heifers and in beef cows.Theriogenology 64, 2022-2036.doi:10.1016/j.theriogenology.2005.05.003 (Pubitemid 41654609)
95. Leroy JL, Van Soom A, Opsomer G, Goovaerts IG, Bols PE (2008) Reduced fertilityinhigh-yielding dairy cows: are the oocyte and embryoindanger? Part II.Mechanisms linking nutrition and reduced oocyte and embryo quality in high-yielding dairy cows.Reproduction in Domestic Animals 43, 623-632.doi:10.1111/j.1439-0531.2007.00961.x
96. Leroy JL, Van Hoeck V, Clemente M, Rizos D, Gutierrez-Adan A, Van Soom A, Uytterhoeven M, Bols PE (2010) The effect of nutritionally induced hyperlipidaemia on in vitro bovine embryo quality.Human Reproduction (Oxford, England) 25, 768-778.doi:10.1093/humrep/dep420
97. Lewis GS (1997) Uterine health and disorders.Journal of Dairy Science 80, 984-994.doi:10.3168/jds.S0022-0302(97)76024-7 (Pubitemid 127447844)
98. Lucy MC (2001) Reproductive loss in high-producing dairy cattle: where will it end? Journal of Dairy Science 84, 1277-1293.doi:10.3168/jds.S0022- 0302(01)70158-0 (Pubitemid 33613020)
99. Lucy MC (2008) Functional differences in the growth hormone and insulinlike growth factor axis in cattle and pigs: implications for postpartum nutrition and reproduction.Reproduction in Domestic Animals 43 (Suppl.2), 31-39.doi:10.1111/j.1439-0531.2008.01140.x
100. Lucy MC, Staples CR, Michel FM, Thatcher WW, Bolt DJ (1991) Effect of feeding calcium soaps to early postpartum dairy cows on plasma prostaglandin F2 alpha, luteinizing hormone, and follicular growth.Journal of Dairy Science 74, 483-489.doi:10.3168/jds.S0022-0302 (91)78195-2
101. Lucy MC, Savio JD, Badinga L, DeLaSota RL, Thatcher WW (1992) Factors that affect ovarian follicular dynamicsin cattle.Journal of Animal Science 70, 3615-3626.
102. Lucy MC, De La Sota RL, Staples CR, Thatcher WW (1993) Ovarian follicular populations in lactating dairy cows treated with recombinant bovine somatotropin (sometribove) or saline and fed diets differing in fat content and energy.Journal of Dairy Science 76, 1014-1027.doi:10.3168/jds.S0022-0302(93) 77429-9
103. Lucy MC, Verkerk GA, Whyte BE, Macdonald KA, Burton L, Cursons RT, Roche JR, Holmes CW (2009) Somatotropic axis components and nutrient partitioning in genetically diverse dairy cows managed under different feed allowancesinapasture system.Journalof Dairy Science92, 526-539.doi:10.3168/jds.2008-1421
104. Macdonald KA, Verkerk GA, Thorrold BS, Pryce JE, Penno JW, McNaughton LR, Burton LJ, Lancaster JA, Williamson JH, Holmes CW (2008) A comparison of three strains of Holstein-Friesian grazed on pasture and managed under different feedallowances.Journal of Dairy Science 91, 1693-1707.doi:10.3168/jds.2007-0441 (Pubitemid 351568635)
105. Macmillan KL, Lean IJ, Westwood CT (1996) The effects of lactation on the fertility of dairy cows.Australian Veterinary Journal 73, 141-147.doi:10.1111/ j.1751-0813.1996.tb10007.x (Pubitemid 126460186)
106. Mapletoft RJ, Lindsell CE, Pawlshyn V (1986) Effects of clenbuterol, body condition, and nonsurgical embryo transfer equipmenton pregnancy rates in bovine recipients.Theriogenology 25, 172.doi:10.1016/0093-691X (86)90226-8[Abstract]
107. Marei WF, Wathes DC, Fouladi-Nashta AA (2010) Impact of linoleic acid on bovine oocyte maturation and embryo development.Reproduction (Cambridge, England) 139, 979-988.doi:10.1530/REP-09-0503
108. Matsui M, Takahashi Y, Hishinuma M, Kanagawa H (1997) Stimulationofthe developmentof bovine embryosbyinsulin and insulin-like growth factor-I (IGF-I) is mediated through the IGF-I receptor.Theriogenology 48, 605-616.doi:10.1016/ S0093-691X(97)00277-X (Pubitemid 28135469)
109. Mattos R, Staples C, Thatcher W (2000) Effects of dietary fatty acids on reproduction in ruminants.Reviews of Reproduction 5, 38-45.doi:10.1530/ror.0. 0050038 (Pubitemid 30050351)
110. Mattos R, Guzeloglu A, Badinga L, Staples C R, Thatcher WW (2003) Polyunsaturated fatty acids and bovine interferon-tau modify phorbol ester-induced secretion of prostaglandin F2 alpha and expression of prostaglandin endoperoxide synthase-2 and phospholipase-A2 in bovine endometrial cells.Biology of Reproduction 69, 780-787.doi:10.1095/biolreprod.102.015057 (Pubitemid 37064606)
111. Mattos R, Staples CR, Arteche A, Wiltbank MC, Diaz FJ, Jenkins TC, Thatcher WW (2004) The effects of feeding fish oil on uterine secretion of PGF2alpha, milk composition, and metabolic status of periparturient Holstein cows.Journal of Dairy Science 87, 921-932.doi:10.3168/jds.S0022-0302(04)73236-1 (Pubitemid 44151717)
112. McCarthy S, Berry DP, Dillon P, Rath M, Horan B (2007) Influence of Holstein-Friesian strain and feed system on body weight and body condition score lactation profiles.Journal of Dairy Science 90, 1859-1869.doi:10.3168/jds.2006- 501 (Pubitemid 350045410)
113. McDougall S (1992) The effect of stocking rate, breed and pre-partum nutrition on post-partum anoestrus.In 'Proceedings of New Zealand Society of Dairy Cattle Veterinarians'.pp.49-67.(Vetlearn Foundation: Wellington, New Zealand)
114. McDougall S, Macmillan KL (1993) Follicle waves, ovulation and oestrus in the postpartum cow.In 'Proceedings of New Zealand Society of Dairy Cattle Veterinarians'.pp.33-47.(Vetlearn Foundation: Wellington, New Zealand)
115. McDougall S, Rhodes FM (1999) Detection of a corpus luteum in apparently anoestrous cows by manual palpation, transrectal ultrasonography and plasma progesterone concentration.New Zealand Veterinary Journal 47, 47-52.doi:10.1080/00480169.1999.36110 (Pubitemid 129332097)
116. McDougall S, Burke CR, MacMillan KL, Williamson NB (1995a) Patterns of follicular development during periods of anovulation in pasture-fed dairy cows after calving.Research in Veterinary Science 58, 212-216.doi:10.1016/0034- 5288(95)90104-3
117. McDougall S, Burke CR, Williamson NB, MacMillan K L (1995b) The effect of stocking rate and breed on the period of postpartum anoestrum in grazing dairy cattle.Proceedings of the New Zealand Society of Animal Production 55, 236-238.
118. McGuire MA, Bauman DE, Dwyer DA, Cohick W S (1995) Nutritional modulation of the somatotropin/insulin-like growth factor system: response to feed deprivation in lactating cows.The Journal of Nutrition 125, 493-502.
119. McNaughton LR, Verkerk GA, Parkinson TJ, Macdonald KA, Holmes C W (2003) Postpartum anoestrous intervals and reproductive performance of three genotypes of Holstein-Friesian dairy cattle managed in a seasonal pasture-based dairy system.Proceedings of the New Zealand Society of Animal Production 63, 77-81.
120. Mee J, Evans R, Dillon P (2004) Is Irish dairy herd fertility declining? In 'Proceedings of the 23rd World Buiatrics Congress'.Quebec.Abstract 3431.
121. Meier S, Burke C R (2010) Understanding the mechanisms contributing to reduced fertility.Sub-fertile phenotypes: what can we learn? In 'Proceedings of the 4th Australasian Dairy Science Symposium: meeting the challenges for pasture-based dairying'.Lincoln University, Christchurch, New Zealand, 31 August 2010.(Eds G R Edwards, R H Bryant) pp.417-423.(Lincoln University: Canterbury, New Zealand)
122. Meier S, Peterson AJ, Mitchell MD, Littlejohn M, Walker C, Roche J R (2009) Genetic strain and reproductive status affect endometrial fatty acid concentration.Journal of Dairy Science 92, 3723-3730.doi:10.3168/jds.2009-2047
123. Meier S, Kolver ES, Verkerk GA, Roche J R (2010) Effects of divergent Holstein-Friesian strain and dieton diurnal patternsof plasma metabolites and hormones.The Journal of Dairy Research 77, 432-437.doi:10.1017/S002202991000052X
124. Miyoshi S, Pate JL, Palmquist D L (2001) Effects of propylene glycol drenching on energy balance, plasma glucose, plasma insulin, ovarian function and conception in dairy cows.Animal Reproduction Science 68, 29-43.doi:10.1016/S0378-4320(01)00137-3 (Pubitemid 32990188)
125. Moore DA, Overton MW, Chebel RC, Truscott ML, BonDurant R H (2005) Evaluation of factors that affect embryonic loss in dairy cattle.Journal of the American Veterinary Medical Association 226, 1112-1118.doi:10.2460/javma.2005. 226.1112 (Pubitemid 40463096)
126. Mulligan FJ, O'Grady L, Gath VP, Rice DA, Doherty M L (2007) Nutrition and fertility in dairy cows.Irish Veterinary Journal 60, 311-314.
127. National Research Council (2001) 'Nutrient requirements of dairy cattle.' (National Academy Press: Washington)
128. O'Callaghan D, Boland M P (1999) Nutritional effects on ovulation, embryo development and the establishment of pregnancy in ruminants.Animal Science (Penicuik, Scotland) 68, 299-314. (Pubitemid 129511165)
129. Ocon OM, Hansen P J (2003) Disruption of bovine oocytes and preimplantation embryos by urea and acidic pH.Journal of Dairy Science 86, 1194-1200.doi:10.3168/jds.S0022-0302(03)73703-5 (Pubitemid 39017217)
130. Ordóñez A, Parkinson TJ, Matthew C, Holmes CW, Miller RD, Lopez-Villalobos N, Burke J, Brookes I (2007) Effects of application inspring of urea fertiliser on aspects of reproductive performance of pasture-fed dairy cows.New Zealand Veterinary Journal 55, 69-76.doi:10.1080/00480169.2007.36744 (Pubitemid 46632497)
131. Palma GA, Muller M, Brem G (1997) Effect of insulin-like growth factor I (IGF-I) at high concentrations on blastocyst development of bovine embryos produced in vitro.Journal of Reproduction and Fertility 110, 347-353.doi:10.1530/jrf.0.1100347
132. Patton J, Kenny DA, McNamara S, Mee JF, O'Mara FP, Diskin MG, Murphy J J (2007) Relationships among milk production, energy balance, plasma analytes, and reproduction in Holstein-Friesian cows.Journal of Dairy Science 90, 649-658.doi:10.3168/jds.S0022-0302(07)71547-3 (Pubitemid 350049711)
133. Pedernera M, Garcia SC, Horagadoga A, Barchia I, Fulkerson W J (2008) Energy balance and reproductionon dairy cows fed toachieve low or high milk production on a pasture-based system.Journal of Dairy Science 91, 3896-3907.doi:10.3168/jds.2008-1098
134. PennoJW(2002) The responsebygrazing dairy cowstosupplementary feeds.Ph D Dissertation, Massey University, New Zealand, Palmerston North.
135. Petit HV, Twagiramungu H(2006) Conception rate and reproductive function of dairy cows fed different fat sources.Theriogenology 66, 1316-1324.doi:10. 1016/j.theriogenology.2006.04.029 (Pubitemid 44232951)
136. Petit HV, Germiquet C, Lebel D (2004) Effect of feeding whole, unprocessed sunflower seeds and flaxseed on milk production, milk composition, and prostaglandin secretion in dairy cows.Journal of Dairy Science 87, 3889-3898.doi:10.3168/jds.S0022-0302(04)73528-6 (Pubitemid 39474562)
137. Petit HV, Cavalieri FB, Santos GT, Morgan J, Sharpe P (2008) Quality of embryos produced from dairy cows fed whole flaxseed and the success of embryo transfer.Journal of Dairy Science 91, 1786-1790.doi:10.3168/jds.2007-0782 (Pubitemid 351730882)
138. Pryce JE, Coffey MP, Brotherstone SH, Woolliams J A (2002) Genetic relationships between calving interval and body condition score conditional on milk yield.Journal of Dairy Science 85, 1590-1595.doi:10.3168/jds.S0022-0302(02) 74229-X (Pubitemid 38572220)
139. Rajala-Schultz PJ, Saville W J A, Frazer GS, Wittum T E (2001) Association between milk urea nitrogen and fertility in Ohio dairy cows.Journal of Dairy Science 84, 482-489.doi:10.3168/jds.S0022-0302(01)74498-0 (Pubitemid 33609630)
140. Reeves M, Fulkerson W, Kellaway R (1996) Production responses of dairy cows grazing well-managed kikuyu (Pennisetum clandestinum) pastures to energy and protein supplementation.Australian Journal of Experimental Agriculture 36, 763-770.doi:10.1071/EA9960763 (Pubitemid 27047895)
141. Rhoads ML, Rhoads RP, Gilbert RO, Toole R, Butler W R (2006) Detrimental effects of high plasma urea nitrogen levels on viability of embryos from lactating dairy cows.Animal Reproduction Science 91, 1-10.doi:10.1016/j. anireprosci.2005.02.009 (Pubitemid 41674551)
142. Rhodes FM, McDougall S, Burke CR, Verkerk GA, Macmillan K L (2003) Invited review: treatment of cows with an extended postpartum anestrous interval.Journal of Dairy Science 86, 1876-1894.doi:10.3168/jds.S0022-0302(03) 73775-8 (Pubitemid 39067048)
143. Rius AG, McGilliard ML, Umberger CA, Hanigan M D (2010) Interaction of energy and predicted metabolizable protein in determining nitrogen efficiency in the lactating dairy cow.Journal of Dairy Science 93, 2034-2043.
144. Roberts AJ, Nugent R A 3rd, Klindt J, Jenkins T G (1997) Circulating insulin-like growth factor I, insulin-like growth factor binding proteins, growth hormone, and resumption of estrus in postpartum cows subjected to dietary energy restriction.Journal of Animal Science 75, 1909-1917. (Pubitemid 127445008)
145. Robinson RS, Mann GE, Gadd TS, Lamming GE, Wathes D C (2000) The expressionofthe I GF system in the bovine uterus throughout the oestrous cycle and early pregnancy.The Journal of Endocrinology 165, 231-243.doi:10.1677/joe.0. 1650231 (Pubitemid 30341072)
146. Roche J R (2007) Milk production responses to pre-and post-calving dry matter intake in grazing dairy cows.Livestock Science 110, 12-24.doi:10.1016/j. livsci.2006.08.016 (Pubitemid 46891412)
147. Roche JR, Petch S, Kay J K (2005) Manipulating the dietary cation-anion difference via drenching to early-lactation dairy cows grazing pasture.Journal of Dairy Science 88, 264-276.doi:10.3168/jds.S0022-0302(05) 72684-9 (Pubitemid 40102965)
148. Roche JR, Berry DP, Kolver E S (2006) Holstein-Friesian strain and feed effectsonmilk production, body weight, and bodyconditionscoreprofiles in grazing dairy cows.Journal of Dairy Science 89, 3532-3543.doi:10.3168/jds.S0022- 0302(06)72393-1 (Pubitemid 44305999)
149. Roche JR, Berry DP, Lee JM, Macdonald KA, Boston R C (2007a) Describing the body condition score change between successive calvings: a novel strategy generalizable to diverse cohorts.Journal of Dairy Science 90, 4378-4396.doi:10.3168/jds.2006-729 (Pubitemid 350045217)
150. Roche JR, Macdonald KA, Burke CR, Lee JM, Berry D P (2007b) Associations among body condition score, body weight, and reproductive performance in seasonal-calving dairy cattle.Journal of Dairy Science 90, 376-391.doi:10.3168/ jds.S0022-0302(07)72639-5 (Pubitemid 350042869)
151. Roche JR, Sheahan AJ, Chagas LM, Berry D P (2007c) Concentrate supplementation reduces postprandial plasma ghrelin in grazing dairy cows: a possible neuroendocrine basis for reduced pasture intake in supplemented cow.Journal of Dairy Science 90, 1354-1363.doi:10.3168/jds.S0022-0302(07)72639-5 (Pubitemid 350045460)
152. Roche JR, Blache D, Kay JK, Miller DR, Sheahan AJ, Miller D W (2008) Neuroendocrine and physiological regulation of intake with particular reference to domesticated ruminant animals.Nutrition Research Reviews 21, 207-234.doi:10.1017/S0954422408138744
153. Roche JR, Friggens NC, Kay JK, Fisher MW, Stafford KJ, Berry D P (2009a) Invited review: body condition score and its association with dairy cow productivity, health, and welfare.Journal of Dairy Science 92, 5769-5801.doi:10.3168/jds.2009-2431
154. Roche JR, Turner LR, Lee JM, Edmeades DC, Donaghy DJ, Macdonald KA, Penno JW, Berry D P (2009b) Weather, herbage quality and milk production in pastoral systems.1.Temporal patterns and intra-relationships in weather variables.Animal Production Science 49, 192-199.doi:10.1071/EA07307
155. Roche JR, Turner LR, Lee JM, Edmeades DC, Donaghy DJ, Macdonald KA, Penno JW, Berry D P (2009c) Weather, herbage quality and milk production in pastoral systems.2.Temporal patterns and intra-relationships in herbage quality and mineral concentration parameters.Animal Production Science 49, 200-210.doi:10.1071/EA07308
156. Roche JR, Kay JK, Phyn CV, Meier S, Lee JM, Burke C R (2010) Dietary structural to nonfiber carbohydrate concentration during the transition period in grazing dairy cows.Journal of Dairy Science 93, 3671-3683.doi:10.3168/jds. 2009-2868
157. Royal MD, Darwash AO, Flint A P F, Web R, Wooliams JA, Lamming G E (2000) Declining fertility in dairy cattle: changes in traditional and endocrine parameters of fertility.Animal Science (Penicuik, Scotland) 70, 487-501.
158. Rubio JM, Hallford DM, Hawkins D E (1997) Effect of glucose administration during the estrous cycle on serum hormone profiles, m RNA for steroidogenic enzymes, and breeding performance of ewes.Journal of Animal Science 75, 775-780. (Pubitemid 127446797)
159. Santos JE, Thatcher WW, Chebel RC, Cerri RL, Galvao K N (2004) The effect of embryonic death rates in cattle on the efficacyof estrus synchronization programs.Animal Reproduction Science 82-83, 513-535.doi:10.1016/j.anireprosci. 2004.04.015 (Pubitemid 39027082)
160. Santos P, Marques A, Antunes G, Chaveiro A, Andrade M, Borba A, da Silva F M (2009) Effects of plasma urea nitrogen levels on the bovine oocyte ability to develop after in vitro fertilization.Reproduction in Domestic Animals 44, 783-787.doi:10.1111/j.1439-0531.2008.01075.x
161. Sartori R, Sartor-Bergfelt R, Mertens SA, Guenther JN, Parrish JJ, Wiltbank M C (2002) Fertilization and early embryonic development in heifers and lactating cows in summer and lactating and dry cows in winter.Journal of Dairy Science 85, 2803-2812.doi:10.3168/jds.S0022-0302 (02)74367-1 (Pubitemid 38571406)
162. Scott TA, Shaver RD, Zepeda L, Yandell B, Smith T R (1995) Effects of rumen-inert fat on lactation, reproduction, and health of high producing Holstein herds.JournalofDairy Science78, 2435-2451.doi:10.3168/jds.S0022- 0302(95)76872-2
163. Sheahan AJ, Kolver ES, Roche J R (2011) Genetic strain and diet effects on grazing behavior, pasture intake and milk production.Journal of Dairy Science 94, doi:10.3168/jds.2010-4089 (in press)
164. Sinclair KD, Kuran M, Gebbie FE, Webb R, McEvoy T G (2000) Nitrogen metabolism and fertility in cattle: II.Development of oocytes recovered from heifers offered diets differing in their rate of nitrogen release in the rumen.Journal of Animal Science 78, 2670-2680.
165. SinclairK D, Rooke J A, McEvoy T G (2003) Regulationofnutrient uptake and metabolism in pre-elongation ruminant embryos.Reproduction (Cambridge, England) Supplement 61, 371-385.
166. Smith TR, McNamara J P (1990) Regulation of bovine adipose tissue metabolism during lactation.6.Cellularity and hormone-sensitive lipase activity as affected by genetic merit and energy intake.Journal of Dairy Science 73, 772-783.doi:10.3168/jds.S0022-0302 (90)78730-9
167. Spicer LJ, Alpizar E, Echternkamp S E (1993) Effects of insulin, insulin-like growth factor I, and gonadotropins on bovine granulosa cell proliferation, progesterone production, oestradiol production, and(or) insulin-like growth factor I production in vitro.Journal of Animal Science 71, 1232-1241.
168. Sreenan J, Diskin M (1986).The extent and timing of embryonic mortality in the cow.In 'Embryonic mortality in farm animals'.(Eds J Sreenan, M Diskin).pp.1-11.(Martinus Nijhoff Publishers, Amsterdam)
169. Stagg K, Spicer LJ, Sreenan JM, Roche JF, Diskin M G (1998) Effect of calf isolation on follicular wave dynamics, gonadotropin and metabolic hormone changes, and interval to first ovulation in beef cows fed either of two energy levels postpartum.Biology of Reproduction 59, 777-783.doi:10.1095/biolreprod59. 4.777 (Pubitemid 28463327)
170. Staples CR, Burke JM, Thatcher W W (1998) Influence of supplemental fats on reproductive tissues and performance of lactating cows.Journal of Dairy Science 81, 856-871.doi:10.3168/jds.S0022-0302 (98)75644-9
171. Stockdale C R (2000) Levels of pasture substitution when concentrates are fed to grazing dairy cows in northern Victoria.Australian Journal of Experimental Agriculture 40, 913-921.doi:10.1071/EA00034
172. Thangavelu G, Colazo M G, Ambrose D J, Oba M, Okine E K, Dyck M K (2007) Diets enriched in unsaturated fatty acids enhance early embryonic development in lactating Holstein cows.Theriogenology 68, 949-957.doi:10.1016/j. theriogenology.2007.07.002 (Pubitemid 47410283)
173. Thatcher WW, Wilcox C J (1973) Postpartum estrus as an indicator of reproductive status in the dairy cow.Journal of Dairy Science 56, 608-610.doi:10.3168/jds.S0022-0302(73)85227-0
174. Thatcher WW, Binelli M, Burke J, Staples CR, Ambrose JD, Coelho S (1997) Antiluteolytic signals between the conceptus and endometrium.Theriogenology 47, 131-140.doi:10.1016/S0093-691X(96)00347-0 (Pubitemid 28135459)
175. Thorne PL, Jago JG, Kolver ES, Roche J R (2003) Diet and genotype affect feeding behaviour of Holstein-Friesian dairy cows during late lactation.Proceedings of the New Zealand Society of Animal Production 63, 124-127.
176. van Knegsel AT, de Vries Reilingh G, Meulenberg S, van den Brand H, Dijkstra J, Kemp B, Parmentier H K (2007) Natural antibodies related to energy balance inearly lactation dairy cows.Journal of Dairy Science 90, 5490-5498.doi:10.3168/jds.2007-0289 (Pubitemid 350254438)
177. Vazquez OP, Smith T R (2000) Factors affecting pasture intake and total dry matter intake in grazing dairy cows.Journal of Dairy Science 83, 2301-2309.doi:10.3168/jds.S0022-0302(00)75117-4
178. Velazquez MA, Zaraza J, Oropeza A, Webb R, Niemann H (2009) The role of IGF1 in the in vivo production of bovine embryos from superovulated donors.Reproduction (Cambridge, England)137, 161-180.doi:10.1530/REP-08-0362
179. Wales WJ, Kolver ES, Egan AR, Roche J R (2009) Effects of strain of Holstein-Friesian and concentrate supplementation on the fatty acid composition of milk fat of dairy cows grazing pasture in early lactation.Journal of Dairy Science 92, 247-255.doi:10.3168/jds.2008-1386
180. Walker CG, Meier S, Mitchell MD, Roche JR, Littlejohn M D (2009) Modulation of the maternal immune system during early bovine pregnancy.Reproduction, Fertility and Development 21, 131.doi:10.1071/ SRB09Abs533
181. WalkerC G, Meier S, Littlejohn M, Lehnert K, Roche JR, Mitchell MD (2010) Modulation of the maternal immune system by the pre-implantation embryo.B MC Molecular Biology 11, 474.doi:10.1186/1471-2164-11-474
182. Wang LM, Feng HL, Ma YZ, Cang M, Li HJ, Zh Y, Zhou P, Wen JX, Shorgan B, Liu D J (2009) Expression of I GF receptors and its ligands in bovine oocytes and preimplantation embryos.Animal Reproduction Science114, 99-108.doi:10.1016/ j.anireprosci.2008.09.019
183. Wathes DC, Abayasekara DR, Aitken R J (2007) Polyunsaturated fattyacids in male and female reproduction.Biology of Reproduction 77, 190-201.doi:10.1095/ biolreprod.107.060558 (Pubitemid 47173600)
184. Wathes DC, Cheng Z, Chowdhury W, Fenwick MA, Fitzpatrick R, Morris DG, Patton J, Murphy J J (2009) Negative energy balance alters global gene expression and immune responses in the uterus of postpartum dairy cows.Physiological Genomics 39, 1-13.doi:10.1152/physiolgenomics.00064.2009
185. Watson AJ, Westhusin ME, Winger Q A (1999) I GF paracrine and autocrine interactions between conceptus and oviduct.Journal of Reproduction and Fertility 54(Suppl), 303-315.
186. Westwood CT, Lean IJ, Kellaway R C (1998) Indications and implications for testing of milk urea in dairy cattle: a quantitative review.Part 2.Effect of dietary protein on reproductive performance.New Zealand Veterinary Journal 46, 123-130.doi:10.1080/00480169.1998.36076 (Pubitemid 128366914)
187. Westwood CT, Lean IJ, Garvin JK, Wynn P C (2000) Effects of genetic merit and varying dietary protein degradabilityonlactating dairy cows.Journal of Dairy Science 83, 2926-2940.doi:10.3168/jds.S0022-0302(00)75193-9
188. Yaakub H, O'Callaghan D, O'Doherty JV, Hyttel P (1997) Effect of dietary intakeonfollicle numbers and oocytemorphologyinunsuperovulated and superovulated ewes.Theriogenology 47, 182.doi:10.1016/S0093-691X (97)82309-6
189. Zachut M, Arieli A, Lehrer H, Argov N, Moallem U (2008) Dietary unsaturated fatty acids influence preovulatory follicle characteristics in dairy cows.Reproduction (Cambridge, England) 135, 683-692.doi:10.1530/REP-07-0556 (Pubitemid 351676452)