title: Ovulations in rat ovaries perfused in vitro with follicle-stimulating hormone.
abstract: Using the model of the isolated perfused rat ovary, we have found that highly purified ovine follicle-stimulating hormone (FSH) preparations cause ovulation and that this effect is not due to luteinizing hormone (LH) contamination. Ovine FSH-13 at a concentration of 1.5 mU/ml induced ovulations in all perfused ovaries (8.8 +/- 2.3 ovulations/ovary), as did a more purified preparation, ovine FSH-211B, at concentrations of 0.5 mU/ml (15.0 +/- 6.4 ovulations/ovary) and 5 mU/ml (11.3 +/- 2.6 ovulations/ovary). This ovulation-inducing effect of FSH is accompanied by a marked stimulation of estradiol levels in the perfusion medium without stimulation of progesterone levels. Furthermore, a purified rat FSH preparation (15 mU/ml) also induced ovulation in all ovaries (13.8 +/- 2.2 ovulations/ovary) as well as a stimulation of both estradiol and progesterone in the medium. These data clearly confirm the direct ovulatory effect of FSH on the ovary.
mesh_terms: D000818:Animals; D046508:Culture Techniques; D004305:Dose-Response Relationship, Drug; D004958:Estradiol / Q000378:metabolism; D005260:Female; D005640:Follicle Stimulating Hormone / Q000494:pharmacology*; D007986:Luteinizing Hormone / Q000494:pharmacology; D010053:Ovary / Q000187:drug effects / Q000378:metabolism; D010060:Ovulation / Q000187:drug effects*; D011374:Progesterone / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone