Naturally menopausal women with hypoactive sexual desire disorder (HSDD) were randomized into a 24-week, multicenter, multinational, double-blind (DB), parallel-group, placebo-controlled study. Patients were randomized to receive a placebo or testosterone transdermal system throughout the study. Safety was assessed by adverse events, lipids, serum chemistry with hepatic, renal and carbohydrate metabolism evaluation, and hematology. Physical exam including clinical assessments of facial hair and acne were monitored.