Ovulation, fertilization and lambing rates, and peripheral progesterone concentrations, in ewes inseminated at a natural oestrus during November or February

Journal of Reproduction and Fertility

Volumn 115, Issue 1, 1999, Pages 133-140

  Mitchell, L M ^a   King, M E ^a   Aitken, R P ^b   Gebbie, F E ^a   Wallace, J M ^b  

^a SCOTTISH AGRICULTURAL COLLEGE   (United Kingdom)

^b ROWETT RESEARCH INSTITUTE   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

PROGESTERONE;

ANIMAL EXPERIMENT; ANIMAL MODEL; ARTICLE; ARTIFICIAL INSEMINATION; CONTROLLED STUDY; CORPUS LUTEUM; ESTRUS; FEMALE; FERTILIZATION; FETUS OUTCOME; LAPAROSCOPY; LUTEAL PHASE; MATING; NONHUMAN; OVULATION; PREGNANCY RATE; PRIORITY JOURNAL; PROGESTERONE BLOOD LEVEL; SEASONAL VARIATION; SHEEP;

ANIMALIA; FALLOPIA; OVIS; OVIS ARIES; VERTEBRATA;

EID: 0033009855     PISSN: 00224251     EISSN: None     Source Type: Journal    
DOI: 10.1530/jrf.0.1150133     Document Type: Article

References (41)

1. Ashworth CJ (1995) Maternal and conceptus factors affecting histotrophic nutrition and survival of embryos Livestock Production Science 44 99-105
2. Ashworth CJ, Sales DI and Wilmut I (1989) Evidence of an association between the survival of embryos and the periovulatory plasma progesterone concentration in the ewe Journal of Reproduction and Fertility 87 23-32
3. Backstrom CT, McNeilly AS, Leask RM and Baird DT (1982) Pulsatile secretion of LH, FSH, prolactin, oestradiol and progesterone during the menstrual cycle Clinical Endocrinology 17 29-42
4. Boyd JS and Ducker MJ (1973) A method of examining the cyclic changes occurring in the sheep ovary using endoscopy Veterinary Record 90 40-43
5. Campbell BK, Scaramuzzi RJ and Webb R (1995) Control of antral follicle development and selection in sheep and cattle Journal of Reproduction and Fertility Supplement 49 335-350
6. Colas G (1983) Factors affecting the quality of ram semen. In Sheep Production pp 453-465 Ed. W Haresign. Butterworths, London
7. Currie WD, Medhamurthy RJ, Cook SJ and Rawlings NC (1993) Seasonal fluctuation in diurnal rhythms of luteinising hormone secretion in ewes during the mid-luteal phase of the oestrous cycle Journal of Reproduction and Fertility 97 71-74
8. Evans G and Maxwell WMC (1987) Salamons Artificial Insemination of Sheep and Goats pp 142-166 Butterworths, London
9. Fabre-Nys C and Martin GB (1991) Hormonal control of proceptive and receptive sexual behaviour and the preovulatory LH surge in the ewe: reassessment of the respective roles of estradiol, testosterone and progesterone Hormones and Behaviour 25 295-312
10. Fletcher IC and Lindsay DR (1971) Effect of oestrogen on oestrous behaviour and its variation with season in the ewe Journal of Endocrinology 50 685-696
11. Hammond J, Jr (1944) On the breeding season in the sheep Journal of Agricultural Science, Cambridge 34 97-105
12. Haresign W (1985) Comparison of the rate of decline in plasma progesterone concentrations at a natural and progesterone-synchronized oestrus and its effect on tonic LH secretion in the ewe Journal of Reproduction and Fertility 75 231-236
13. Hunter GL, Adams CE and Rowson LEA (1955) Interbreed ovum transfer in sheep Journal of Agricultural Science Cambridge 46 143-149
14. Hunter MG and Southee JA (1987) Treatment with progesterone affects follicular steroidogenesis in anoestrous ewes Animal Reproduction Science 14 273-279
15. Hunter MG, Southee JA, McLeod BJ and Haresign W (1986) Progesterone pretreatment has a direct effect on GnRH-induced preovulatory follicles to determine their ability to develop into normal corpora lutea in anoestrous ewes Journal of Reproduction and Fertility 76 349-363
16. Jeffcoate IA, Rawlings NC and Howell WE (1984) Duration of the breeding season and response to reproductive manipulation in five breeds of sheep under northern prarie conditions Theriogenology 22 279-290
17. Joseph IBJK, Currie WD and Rawlings NC (1992) Effects of time after ovariectomy, season and oestradiol on luteinizing hormone and follicle-stimulating hormone secretion in ovariectomized ewes Journal of Reproduction and Fertility 94 511-523
18. Joseph IBJK, Ravindra JP and Rawlings NC (1995) Oestradiol and the preovulatory surges of luteinising hormone and follicle stimulating hormone in ewes during the breeding season and transition into anoestrus Animal Reproduction Science 40 291-298
19. Joseph IBJK, Currie WD, Ravindra JF, Cook SJ and Rawlings NC (1994) Oestradiol and the surge release of gonadotrophins in the ewe Animal Reproduction Science 34 217-230
20. Karsch FJ (1987) Central actions of ovarian steroids in the feedback regulation of pulsatile secretion of luteinizing hormone Annual Reviews of Physiology 49 365-382
21. Karsch FJ, Bittman EL, Foster DL, Goodman RL, Legan SJ and Robinson JE (1984) Neuroendocrine basis of seasonal reproduction Recent Progress in Hormone Research 40 185-231
22. Lamming GE and Mann GE (1995) A dual role for progesterone in the control of cyclicity in ruminants Journal of Reproduction and fertility Supplement 49 561-566
23. Malpaux B and Karsch FJ (1990) A role for short days in sustaining seasonal reproductive activity in the ewe Journal of Reproduction and Fertility 90 555-562
24. Malpaux B, Robinson JE, Wayne NL and Karsch FJ (1989) Regulation of the onset of the breeding season of the ewe: importance of long days and of an endogenous reproductive rhythm Journal of Endocrinology 122 269-278
25. McNatty KP, Hudson NL, Henderson KM, Lun S, Heath DA, Gibb M, Ball K, McDiarmid JM and Thurley DC (1984) Changes in gonadotrophin secretion and ovarian antral follicular activity in seasonally breeding sheep throughout the year Journal of Reproduction and Fertility 70 309-321
26. McNeilly AS and Fraser HM (1987) Effect of gonadotrophin releasing hormone agonist induced suppression of LH and FSH on follicle growth and corpus luteum function in the ewe Journal of Endocrinology 115 273-282
27. McNeilly AS, Picton HM, Campbell BK and Baird DT (1991) Gonadotrophic control of follicle growth in the ewe Journal of Reproduction and Fertility Supplement 43 177-186
28. Mitchell LM, King ME, Aitken RP and Wallace JM (1996) Effect of mating season and body condition on ovulation, fertilization and pregnancy rates in crossbred ewes Theriogenology 45 293
29. Mitchell LM, King ME, Aitken RP and Wallace JM (1997) Influence of lambing date on subsequent ovarian cyclicity and ovulation rate in ewes Animal Science 65 75-81
30. Monget P and Martin GB (1997) Involvement of insulin-like growth factors in the interactions between nutrition and reproduction in female mammals Human Reproduction 12 Supplement 1 33-52
31. Montgomery GW, Scott IC and Johnstone PD (1988) Seasonal changes in ovulation rate in Coopworth ewes maintained at different liveweights Animal Reproduction Science 17 197-205
32. Niswender GD, Reichert LE, Jr, Midgley AR and Nalbandov AV (1969) Radioimmunoassay for bovine and ovine luteinising hormone Endocrinology 84 1166-1173
33. Rhind SM (1992) Nutrition: its effects on reproductive performance and its hormonal control in female sheep and goats. In Progress in Sheep and Goat Research pp 25-51 Ed. AW Speedy. CAB International, Wallingford
34. Robinson JE, Radford HM and Karsh FJ (1985) Seasonal changes in pulsatile luteinizing hormone (LH) secretion in the ewe: relationship of frequency of LH pulses to day length and response to estradiol negative feedback Biology of Reproduction 33 324-334
35. Russel AJF, Doney JM and Gunn RB (1969) Subjective assessment of body fat in live sheep Journal of Agricultural Science Cambridge 72 451-454
36. Scaramuzzi RJ and Radford HN (1983) Factors regulating ovulation rate in the ewe Journal of Reproduction and Fertility 69 353-367
37. Scaramuzzi RJ, Adams NR, Baird DT et al. (1993) A model for follicle selection and the determination of ovulation rate in the ewe Reproduction Fertility and Development 5 459-478
38. Vipond JE (1997) May lambing: production targets. Technical Note T429 The Scottish Agricultural College
39. Webster GM and Haresign W (1983) Seasonal changes in LH and prolactin concentrations in ewes of two breeds Journal of Reproduction and Fertility 67 465-471
40. Wheeler AG and Land RB (1977) Seasonal variation in oestrus and evarian activity of Finnish Landrace. Tasmanian Merino and Scottish Blackface ewes Animal Production 24 363-376
41. Zareo L, Stabenfeldt GH, Quirke JF, Kindahl H and Brandford GE (1988) Release of prostaglandin F-2α and the timing of events associated with luteolysis in ewes with oestrous eyeles of different lengths Journal of Reproduction and Fertility 83 517-526