Endocrine impact of pure estradiol replacement in postmenopausal women: Alterations in anterior pituitary hormone release and circulating sex steroid hormone concentrations

Johannes D. Veldhuis, Eugene Samojlik, William S. Evans, Alan D. Rogol, Chester E. Ridgeway, William F. Crowley, Lisa Kolp, Eva Checinska, Marvin A. Kirschner, Michael O. Thorner, Paul Stumpf

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Thirteen healthy postmenopausal volunteers were studied under basal conditions and at intervals (days 1, 5, 10, and 30) after intravaginal placement of a polysiloxane ring impregnated with 400 mg of estradiol. Mean serum estradiol concentrations rose 26-fold with a twofold increase in serum estrone concentrations. Serum Δ4-androstenedione, dehydroepiandrosterone sulfate, and total testosterone did not change, but absolute and percent free testosterone concentrations declined significantly by day 5. Concurrently, serum concentrations of immunoactive follicle-stimulating hormone declined progressively, while serum luteinizing hormone and free α-subunit concentrations exhibited a biphasic pattern of suppression. Serum levels of prolactin increased monophasically and those of growth hormone, somatomedin C, and thyroid-stimulating hormone did not change.

Original languageEnglish (US)
Pages (from-to)334-339
Number of pages6
JournalAmerican journal of obstetrics and gynecology
Volume155
Issue number2
DOIs
StatePublished - Aug 1986

Keywords

  • Estradiol
  • gonadotropins
  • menopause
  • pituitary
  • sex steroids

ASJC Scopus subject areas

  • Obstetrics and Gynecology

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