Effects of progesterone implants in the mesencephalon of ovariectomized rats on LH and FSH release triggered by exogenous gonadal steroids.
Unilateral implantation of crystalline progesterone into the caudal mesencephalic reticular formation (MRF) of chronically ovariectomized adult rats prevents the triggering effect of exogenous gonadal steroids on LH release and does not affect the release of FSH in the same animal.
D000818:Animals; D002369:Castration; D004343:Drug Implants; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood*; D007700:Kinetics; D007986:Luteinizing Hormone / Q000097:blood*; D008636:Mesencephalon / Q000187:drug effects*; D011374:Progesterone / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats
D004343:Drug Implants; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone