title: [Release of steroid hormones in vitro by ovarian follicles of various degrees of maturity in hens and cows].
abstract: The growth of ovary follicules was accompanied by a considerable decrease in the secretion of progesterone, testosterone and estradiol, as well as by a decrease of the estradiol share in total hormone production,--both in hens and in cows. The hens also revealed a decrease of the testosterone share and an increase of the progesterone share in total hormone production. the data obtained suggest a functional atresia of the ovary follicules in hens as well as in mammals. the hen mature follicules, however, differ from those of mammals in that the progesterone secretion is higher in them as compared with other steroids, the progesterone being the main ovulatory hormone in birds.
authors: A V
authors: AV
authors: Sirotkin
authors: V B
authors: VB
authors: Dmitriev
authors: A K
authors: AK
authors: Golubev
mesh_terms: D000818:Animals; D002417:Cattle; D002645:Chickens; D004958:Estradiol / Q000378:metabolism*; D005260:Female; D005496:Follicular Atresia; D066298:In Vitro Techniques; D006080:Ovarian Follicle / Q000378:metabolism* / Q000502:physiology; D011374:Progesterone / Q000378:metabolism*; D013739:Testosterone / Q000378:metabolism*
chemical_list: D013739:Testosterone; D011374:Progesterone; D004958:Estradiol
vernacular_title: Vydelenie steroidnykh gormonov in vitro ovarial'nymi follikulami raznoĭ stepeni zrelosti u kur i korov.