Abstract
In vivo experiments, a single administration of progesterone or prednisone induced ovulation and larger dosages of them reduced significantly the ovulatory response. Moreover, ovulation induced by them was facilitated by the simultaeneous addition of either HCG or PMS which was subthreshold amounts to induce ovulation by itself.Estradiol could not induce ovulation by itself.In vitro experiments, progesterone, prednisone, testosterone and newly formed synthetic progestogens had potent ovulatory capacity. In addition, estradiol blocked significantly pituitary-induced ovulation, but this inhibition was readily removed if progesterone were added to the pituitary-estrogen combinations.It is proposed that amphibian ovulation is induced by the direct action of steroids on the ovary without the mediation of the hypothalamic-pituitary axis.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
