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Removal of the ovaries at hysterectomy
Title:Hysterectomy, oophorectomy, and endogenous sex hormone levels in
older women:
the Rancho Bernardo Study
Author: G. Laughlin, et al.
Address: La Jolla, California
Source: The Journal of Clinical Endocrinology & Metabolism 85: 645-651
(February) 2000
Summary: This study examines the cross-sectional association of
hysterectomy and oophorectomy status, chronological age, and years since
menopause with plasma levels of total and bioavailable testosterone and
estradiol, androstenedione, estrone, and sex hormone-binding globulin (SHBG) in
684 postmenopausal women not using ERT. After adjustment for age and body mass
index, both total and bioavailable testosterone levels were reduced by more than
40% in hysterectomized women with bilateral oophorectomy compared to those in
intact women, with intermediate levels observed in hysterectomized women with
ovarian conservation. Androstenedione levels were about 10% lower in
hysterectomized women with or without ovarian conservation compared to intact
women. Total estradiol levels tended to be lower in bilaterally oophorectomized
women. Levels of bioavailable estradiol, estrone, and SHBG did not differ by
hysterectomy and oophorectomy status. Among intact women, total testosterone
levels increased with age, reaching premenopausal levels for the 70-79 decade
with relatively stable levels thereafter. Among oophorectomized women, total and
bioavailable testosterone levels did not vary with age and were 40-50% lower than
those in intact women throughout the 50-89 yr. age range. Androstenedione levels
decreased 27% and SHBG levels increased 30% with age in intact women.
Stratification by years since menopause or surgery yielded similar results. The
postmenopausal ovary is a critical source of androgen throughout the lifespan of
older women.
Comment: Clearly elective removal of the ovaries markedly reduces the risk of
ovarian cancer and is generally thought to be the standard of care after age 50,
perhaps age 45. While the ovaries produce only minimal amounts of estrogen, they
continue to produce androgen. It is very difficult to weigh a potential for an
improvement in sense of well being and quality of life in many against preventing
the real risk of fatal ovarian cancer in a few.