Endogenous Estrogen Levels in Postmenopausal Women with Severe Urogenital Atrophy

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Abstract
In order to be able to evaluate the systemic influence of exogenous estrogen therapy in different conditions, it is important to have knowledge of the endogenous estrogen levels. The present study was undertaken to assess the basic levels and possible fluctuations of endogenous estrogen in postmenopausal women with urogenital estrogen deficiency. Plasma concentration levels of unconjugated estrone and estradiol were measured at regular intervals during 24 h in 5 postmenopausal women without estrogen treatment. All women had very low levels of estradiol. No diurnal fluctuation was found. Estrone levels were not measurable with a sensitive RIA technique.

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