Synchronization of Oestrus in Goats with Progestogen Sponges and Short Term Combined FGA, PGF2α Protocols
The study aimed to evaluated the reproductive performance response to short term oestrus synchronization during the transition period. One hundred and sixty-five indigenous multiparous non-lactating goats were subdivided into the following six treatment groups for oestrus synchronization: NT control Group (N= 30), Fe-21d, FGA vaginal sponge for 21days+eCG at 19thd; FPe- 11d, FGA 11d + PGF2α and eCG at 9th d; FPe-10d, FGA 10d+ PGF2α and eCG at 8th d; FPe-9d, FGA 9d +PGF2α and eCG at 7thd; PFe-5d, PGF2α at d0 + FGA 5d + eCG at 5thd. The goats were natural mated (1 male/6 females). Fecundity rates (n. births /n. females treated x 100) were statistically higher (P < 0.05) in short term FPe-9d (157.9%), FPe- 11d (115.4%), FPe-10d (111.1%) and PFe-5d (107.7%) groups compared to the NT control Group (66.7%).
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1333720Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 4215
 R. Gordon, "Controlled reproduction in sheep and goats. In: Artificial control of estrus and ovulation", Gordon IR (Ed.), CAB International, New York, 1997, pp. 87-89.
 W. Holtz, "Recent developments in assisted reproduction in goats", Small Rumin. Res., Vol. 60, pp 95-110, 2005.
 C. Vi├▒oles, M. Forsberg, G. Banchero, and E. Rubianes, "Effect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes", Theriogenology, vol. 55, pp. 993-1004, 2001.
 M. G. Diskin, E. G. Austin, and J. F. Roche, "Exogenous hormonal manipulation of ovarian activity in cattle". Dom. Anim. Endocr., vol. 23, pp. 211-228, 2002.
 O. J. Ginther, and K. Kot, "Follicular dynamics during the ovulatory season in goats", Theriogenology, vol. 42, pp. 987-1001. 1994
 A. Menchaca, and E. Rubianes, "Relation between progesterone concentrations during the early luteal phase and follicular dynamics in goats", Theriogenology, vol. 57, pp. 1411-1419, 2002.
 G.W. Snedecor, and W. G. Cochran, Statistical Methods, 7th ed. The Iowa State University Press, Ames, USA., 1980.
 O. Gaston-Parry, K. Heasman, J. K. E. Nemorin, and T. J., Robinson,. "A radioimmunoassay for fluorogestone acetate (FGA) and its application to the measurement of plasma FGA and progesterone in ewes treated with FGA-impregnated intravaginal sponges", Aust. J. Biol. Sci. vol. 41, pp. 57-67,.1988.
 C. Vi├▒oles, A. Meikle, M. Forsberg, and E. Rubianes, "The effect of subluteal levels of exogenous progesterone on follicular dynamics and endocrine patterns during the luteal phase of the ewe. Theriogenology, vol. 51, pp. 1351-1361, 1999.
 T. D. Quinlivan, and T. J. Robinson , "Numbers of spermatozoa in the genital tract after artificial insemination of progestagen-treated ewes" J. Reprod. Fert., vol. 19, pp. 73-86, 1969
 J. M. Corteel, B. Leboeuf, and G. Baril, "Artificial breeding of adult goats and kids induced with hormones to ovulate outside the breeding season". Small Rum. Res., vol. 1, pp. 19-33, 1988.
 B. Leboeuf, D. Forgerit, D. Bernelas, J. L. Pougnard, E. Senty, and M. A., Driancourt, Theriogenology, vol. 60, pp. 1371ÔÇö1378, 2003.
 G. Martemucci, and A. G. D-Alessandro, "Strategie di miglioramento dell-efficienza riproduttiva negli ovini. Sincronizzazione farmacologia degli estri e delle ovulazioni. (Strategies for improve reproductive efficiency in sheep: pharmacological synchronization of estrus and ovulation)", Agricoltura Ricerca, vol. 183, pp. 3-18, 1999.
 E. Rubianes, and A. Menchaca, "The pattern and manipulation of ovarian follicular growth in goats", Anim. Reprod. Sci., vol. 78, pp. 271-287, 2003.
 A. Menchaca, and E. Rubianes, "New treatments associated with timed artificial insemination in small ruminants", Reprod. Fert. Dev., vol. 16, pp. 403-413, 2004.