Circulating testosterone in women declines during the late reproductive years such that otherwise healthy women in their 40s have approximately half the testosterone level as women in their 20s. Despite this, research showing the benefits of androgen replacement has been limited to the postmenopausal years. In view of the known premenopausal physiological decline in testosterone, we have evaluated the efficacy of transdermal testosterone therapy on mood, well-being, and sexual function in eugonadal, premenopausal women presenting with low libido.
Premenopausal women with low libido participated in a randomized, placebo-controlled, crossover, efficacy study of testosterone cream (10 mg/day) with two double-blind, 12-week, treatment periods separated by a single-blind, 4-week, washout period.
Thirty-four women completed the study per protocol, with 31 women (mean age 39.7 ± 4.2 years; serum testosterone 1.07 + 0.50 nmol/L) providing complete data. Testosterone therapy resulted in statistically significant improvements in the composite scores of the Psychological General Well-Being Index [+12.9 (95% CI, +4.6 to +21.2), P = 0.003] and the Sabbatsberg Sexual Self-Rating Scale [+15.7 (95% CI, +6.5 to +25.0), P = 0.001] compared with placebo. A mean decrease in the Beck Depression Inventory score approached significance [−2.8 (95% CI, −5.7 to +0.1), P = 0.06]. Mean total testosterone levels during treatment were at the high end of the normal range, and estradiol was unchanged. No adverse effects were reported.
Testosterone therapy improves well-being, mood, and sexual function in premenopausal women with low libido and low testosterone. As a substantial number of women experience diminished sexual interest and well-being during their late reproductive years, further research is warranted to evaluate the benefits and safety of longer-term intervention.
From the 1Jean Hailes Foundation Research Unit, Clayton, Victoria, Australia; and the 2Department of Epidemiology and Preventive Medicine, Monash University, Central and Eastern Clinical School, Prahran, Victoria, Australia.
Received December 10, 2002; revised and accepted January 23, 2003.
This study was supported by a Commonwealth Government Best Practice Grant to the Jean Hailes Foundation Research Unit, Clayton, Australia.
Address correspondence to: Susan R Davis, Jean Hailes Foundation Research Unit, 173 Carinish Road, Clayton, Victoria, Australia 3168. E-mail: firstname.lastname@example.org.