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Endocrinology

Compound in contraceptives, HRT antagonizes behavioral effects of estrogen

Published in Women's Health Weekly, August 19th, 2004

Medroxyprogesterone acetate, a compound found in some contraceptives and in hormone therapies antagonizes certain behavioral effects of estrogen, a study in macaque monkeys demonstrated.

"Medroxyprogesterone acetate (MPA) commonly is used in contraception and hormone replacement therapy. However, little is known about its effects within the central nervous system. Using ovariectomized pigtail macaques ( Macaca nemestrina), we evaluated the potential for MPA to antagonize estradiol (E2) effects on female sociosexual behavior," said K. Pazol and colleagues, Emory University.

They sequentially administered placebo, then E2 along, then E2 plus...

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