Inhibition of multiple ovulation in hypophysectomized hens treated with gonadotrophins.
Administration of PMSG or FSH to hypophysectomized hens prevented the multiple ovulation (2-3 ova) induced by an OIH. Inhibition of multiple ovulation did not occur when FSH was injected 1/2-2 hr before the OIH injection. The results are believed to support the theory that withdrawal of FSH stimulation sensitizes a follicle to the OIH in the normal hen.
D000818:Animals; D002645:Chickens / Q000502:physiology*; D005260:Female; D005640:Follicle Stimulating Hormone / Q000494:pharmacology*; D006064:Gonadotropins, Equine / Q000494:pharmacology*; D007016:Hypophysectomy; D007986:Luteinizing Hormone / Q000494:pharmacology; D010060:Ovulation / Q000187:drug effects*; D013480:Superovulation / Q000187:drug effects*
D006064:Gonadotropins, Equine; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone