Prasterone (DHEA) for the Treatment of Hypoactive Sexual Desire Disorder (HSDD)

Inclusion Criteria (main criteria): * Postmenopausal women (hysterectomized or not). * Women between 40 and 80 years of age. * Being in a stable relationship with the opportunity for sexual activity or masturbation at least once a month during the last 6 months or longer (before screening visit) and during the following 8 months. * Diagnosis of HSDD confirmed by a qualified clinician. * Willing to participate in the study and sign an informed consent. Exclusion Criteria (main criteria): * Chronic or acute life stress or major life change that could have interfered and continues to interfere significantly with sexual activity. * Taking drugs which could be responsible for HSDD. * Severe medical condition which can explain the loss of sexual desire. * The administration of any investigational drug within 30 days of screening visit. * Clinically significant abnormal serum biochemistry, urinalysis or hematology.