Ovulation and LH secretion in the goat after intravaginal progestagen sponge-PMSG treatment.
The time and rate of ovulation, and preovulatory release of LH were examined in Angora goats after treatment with progestagen-impregnated intravaginal sponges with or without PMSG during the anoestrous and breeding seasons. The administration of PMSG was necessary to stimulate a satisfactory ovulatory response in lactating and non-lactating females, and in the anoestrous and breeding seasons. Increasing doses of PMSG increased the ovulation rate in non-lactating goats and advanced the time of ovulation in lactating and non-lactating females. The advancement of time of ovulation and of the preovulatory LH surge was most pronounced when PMSG was administered 48 h before rather than at sponge removal.
D000780:Anestrus; D000818:Animals; D001947:Breeding; D005260:Female; D003425:Flurogestone Acetate / Q000494:pharmacology; D006041:Goats; D006064:Gonadotropins, Equine / Q000494:pharmacology*; D007774:Lactation; D007986:Luteinizing Hormone / Q000097:blood / Q000378:metabolism*; D010060:Ovulation / Q000187:drug effects*; D011247:Pregnancy; D012636:Secretory Rate / Q000187:drug effects; D013997:Time Factors
D006064:Gonadotropins, Equine; D007986:Luteinizing Hormone; D003425:Flurogestone Acetate