Ultrasound and endocrine evaluation of the ovarian response to a single dose of 500 IU of eCG following a 12-day treatment with progestogen-releasing intravaginal sponges in the breeding and nonbreeding seasons in ewes

Theriogenology

Volumn 61, Issue 2-3, 2004, Pages 311-327

  Barrett, D M W ^a   Bartlewski, P M ^b   Batista Arteaga, M ^c   Symington, A ^a   Rawlings, N C ^a  

^a UNIVERSITY OF SASKATCHEWAN   (Canada)

^b UNIVERSITY OF SASKATCHEWAN   (Canada)

^c UNIVERSITY OF LAS PALMAS DE GRAN CANARIA   (Spain)

Author keywords

Antral follicles; eCG; Ewes; Progestogen sponge; Ultrasound

Indexed keywords

OVIS;

EID: 0347026761     PISSN: 0093691X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0093-691X(03)00215-2     Document Type: Article

References (39)

1. Gordon IR. Controlled reproduction in farm animals series, vol. 2. Controlled reproduction in sheep and goats. New York: CAB International; 1997.
2. Gordon IR. Induction of early breeding in sheep by standard and modified progestagen-PMSG treatments. J Agric Sci Lond 1971;76:337-41.
3. Botha HK, Van Niekerk CH, Pagel RFE. The influence of synchronisation of the estrus period, PMSG [pregnant mare serum gonadotrophin] administration and flushing on estrus and conception of South African sheep. S Afr J Anim Sci 1975;5:231-3.
4. Robinson TJ. The augmentation of fertility by gonadotrophin treatment of the ewe in the normal breeding season. J Agric Sci Cambridge 1951;41:6-38.
5. Driancourt MA, Fry RC. Effect of superovulation with pFSH or PMSG on growth and maturation of the ovulatory follicles in sheep. Anim Reprod Sci 1992;27:279-92.
6. Moor RM, Osborn JC, Crosby IM. Gonadotrophin-induced abnormalities, in sheep oocytes after superovulation. J Reprod Fertil 1985;74:167-72.
7. Bartlewski PM, Beard AP, Cook SJ, Rawlings NC. Ovarian follicular dynamics during anoestrus in ewes. J Reprod Fertil 1998;113:275-85.
8. Bartlewski PM, Beard AP, Rawlings NC. An ultrasonographic study of luteal function in breeds of sheep with different ovulation rates. Theriogenology 1999;52:115-30.
9. Bartlewski PM, Beard AP, Cook SJ, Chandolia RK, Honaramooz A, Rawlings NC. Ovarian antral follicular dynamics and their relationships with endocrine variables throughout the oestrous cycle in breeds of sheep differing in prolificacy. J Reprod Fertil 1999;115:111-24.
10. Bartlewski PM, Beard AP, Rawlings NC. Ovarian function in ewes at the onset of the breeding season. Anim Reprod Sci 1999;57:67-88.
11. Bartlewski PM, Beard AP, Rawlings NC. Ovarian function in ewes during the transition from the breeding season to anoestrus. Anim Reprod Sci 1999;57:51-66.
12. Bartlewski PM, Vanderpol J, Beard AP, Cook SJ, Rawlings NC. Ovarian antral follicular dynamics and their associations with peripheral concentrations of gonadotrophins and ovarian steroids in anoestrous Finnish Landrace ewes. Anim Reprod Sci 2000;58:273-91.
13. Robinson TJ. Controlled sheep breeding: update 1980-1985. Aust J Biol Sci 1988;41:1-13.
14. Jabbour HN, Evans G. Ovarian and endocrine responses of Merino ewes to treatment with PMSG and/or FSH-P. Anim Reprod Sci 1991;26:93-106.
15. Ravindra JP, Rawlings NC, Evans ACO, Adams GP. Ultrasonographic study of ovarian follicular dynamics in ewes during the oestrous cycle. J Reprod Fertil 1994;101:501-9.
16. Schrick FN, Surface RA, Pritchard JY, Dailey RA, Townsend EC, Inskeep EK. Ovarian structures during the estrous cycle and early pregnancy in ewes. Biol Reprod 1993;49:1133-40.
17. Rawlings NC, Jeffcoate IA, Rieger DL. The influence of estradiol-17beta and progesterone on peripheral serum concentrations of luteinizing hormone and follicle stimulating hormone in the ovariectomized ewe. Theriogenology 1984;22:473-88.
18. Joseph IBJK, Currie WD, Rawlings NC. Effects of time after ovariectomy, season and oestradiol on luteinizing hormone and follicle-stimulating hormone secretion in ovariectomized ewes. J Reprod Fertil 1992;94:511-23.
19. Currie WD, Rawlings NC. Fluctuation in responsiveness of LH and lack of responsiveness of FSH to prolonged infusion of morphine and naloxone in the ewe. J Reprod Fertil 1989;86:359-66.
20. Clifton DK, Steiner RA. Cycle detection: a technique for estimating the frequency and amplitude of episodic fluctuations in blood hormone and substrate concentrations. Endocrinology 1983;112:1057-64.
21. Gordon IR. Controlled breeding in farm animals. Oxford: Pergamon Press; 1983.
22. Gordon IR. The use of progestagens in sheep bred by natural and artificial insemination. Ann Biol Anim Biochem Biophys 1975;15:303-15.
23. Boland MP, Gordon IR, Kelleher DL. The effect of treatment by prostaglandin analogue (ICI-80996) or progestagen (SC-9880) on ovulation and fertilization in cyclic ewes. J Agric Sci Cambridge 1978; 91:727-30.
24. Ainsworth L, Hackett AJ, Heaney DP, Langford GA, Peters HF. A multidisciplinary approach to the development of controlled breeding and intensive production systems for sheep. USA: Management of reproduction in sheep and goats symposium; 1977. p. 101-8.
25. Boland MP, Kelleher D, Gordon I. Comparison of control of oestrus and ovulation in sheep by an ear implant (SC-21009) or by intravaginal sponge (cronolone or MAP). Anim Reprod Sci 1979;1:275-81.
26. Karsch FJ, Foster DL, Legan SJ, Ryan KD, Peter GK. Control of the preovulatory endocrine events in the ewe: interrelationship of estradiol, progesterone, and luteinizing hormone. Endocrinology 1979;105:421-6.
27. Karsch FJ, Legan SJ, Ryan KD, Foster DL. Importance of estradiol and progesterone in regulating LH secretion and estrous behavior during the sheep estrous cycle. Biol Reprod 1980;23:404-13.
28. Goodman RL. Neuroendocrine control of the ovine estrous cycle. In: Knobil E, Neill JD, editors. The physiology of reproduction. New York: Raven Press; 1994. p. 660-93.
29. Mihm M, Baguisi A, Boland MP, Roche JF. Association between the duration of dominance of the ovulatory follicle and pregnancy rate in beef heifers. J Reprod Fertil 1994;102:123-30.
30. Revah I, Butler WR. Prolonged dominance of follicles and reduced viability of bovine oocytes. J Reprod Fertil 1996;106:39-47.
31. Mihm M, Curran N, Hyttel P, Knight PG, Boland MP, Roche JF. Effect of dominant follicle persistence on follicular fluid oestradiol and inhibin and on oocyte maturation in heifers. J Reprod Fertil 1999; 116:293-304.
32. Evans ACO, Duffy P, Quinn KM, Knight PG, Boland MP. Follicular waves are associated with transient fluctuations in FSH but not oestradiol or inhibin-A concentrations in anoestrous ewes. Anim Sci 2001; 72:547-54.
33. Evans ACO, Duffy P, Hynes N, Boland MP. Waves of follicle development during the estrous cycle in sheep. Theriogenology 2000;53:699-715.
34. Evans ACO, Flynn JD, Quinn KM, Duffy P, Quinn P, Madgwick S, et al. Ovulation of aged follicles does not affect embryo quality or fertility after a 14-day progestagen estrus synchronization protocol in ewes. Theriogenology 2001;56:923-36.
35. Nephew KP, Cardenas H, McClure KE, Ott TL, Bazer FW, Pope WF. Effects of administration of human chorionic gonadotropin or progesterone before maternal recognition of pregnancy on blastocyst development and pregnancy in sheep. J Anim Sci 1994;72:453-8.
36. Nishigai M, Takamura A, Kamomae H, Tanaka T, Kaneda Y. The effect of human chorionic gonadotropin on the development and function of bovine corpus luteum. J Reprod Dev 2001;47:283-94.
37. Thatcher WW, Moreira F, Santos JE, Mattos RC, Lopes FL, Pancarci SM, et al. Effects of hormonal treatments on reproductive performance and embryo production. Theriogenology 2001;55:75-89.
38. Nishigai M, Kamomae H, Tanaka T, Kaneda Y. Improvement of pregnancy rate in Japanese Black cows by administration of hCG to recipients of transferred frozen-thawed embryos. Theriogenology 2002;58: 1597-606.
39. Thatcher WW, Moreira F, Pancarci SM, Bartolome JA, Santos JE. Strategies to optimize reproductive efficiency by regulation of ovarian function. Domest Anim Endocrinol 2002;23:243-54.