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Related Experiment Videos

Ovarian function in women immediately post partum

B Acar, R Fleming, M C Macnaughton

    Obstetrics and Gynecology
    |April 1, 1981
    PubMed
    Summary

    The corpus luteum primarily secretes progesterone during pregnancy. Other ovarian tissues produce estrogens, androgens, and progesterone, with estradiol synthesized from estrone and testosterone.

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    Area of Science:

    • Reproductive Endocrinology
    • Ovarian Physiology
    • Maternal-Fetal Medicine

    Background:

    • Understanding ovarian function during late pregnancy is crucial for reproductive health.
    • Previous research has focused on specific ovarian hormones, but a comprehensive analysis in pregnant women at term is needed.

    Purpose of the Study:

    • To investigate the specific roles of the corpus luteum and extraluteal ovarian tissue in hormone production during late pregnancy.
    • To quantify steroid hormone and human chorionic gonadotropin (hCG) levels in ovarian and peripheral circulation.

    Main Methods:

    • Simultaneous plasma sampling from ovarian and antecubital veins in term pregnant women.
    • Radioimmunoassay (RIA) analysis for progesterone, estradiol, estrone, androstenedione, testosterone, and hCG concentrations.

    Main Results:

    • The corpus luteum predominantly secreted progesterone, with minimal estrogen or androgen production.
    • Extraluteal ovarian tissue was a source of progesterone, estrogens, and androgens.
    • Estradiol synthesis was linked to both estrone and testosterone.
    • No correlation was observed between hCG levels and ovarian steroid concentrations.

    Conclusions:

    • The corpus luteum is the primary source of progesterone in late pregnancy.
    • Extraluteal ovarian tissue contributes significantly to the production of various ovarian steroids.
    • Estradiol production involves conversion from estrone and testosterone.
    • hCG does not appear to directly regulate ovarian steroidogenesis in term pregnancy.

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