Stress Hormones, Mood and Women's Sexual Desire (MODEST)

Inclusion Criteria for HSDD Group: * (1) diagnosis of HSDD * (2) over 19 years of age * (3) sexual complaints of low desire of at least 12 months duration. Inclusion criteria for Control group: * (1) sexually healthy, i.e., must not meet criteria for any sexual dysfunction, as determined by a telephone screening, followed by an in-person structured assessment, the Decreased Sexual Desire Screener (DSDS) * (2) over 19 years of age. Exclusion Criteria for both Control and HSDD groups: * (1) lack of fluency in English * (2) currently meeting DSM-IV-TR diagnostic criteria for major depressive disorder as measured by an in-person, semi-structured interview based on the Major Depressive Disorder Module of the Structured Clinical Interview for DSM-IV-TR (SCID-I * (3) current use of prescription drugs such as antidepressants or other medications with known sexual side effects (e.g., glucocorticoids, aromatase inhibitors), or known effects on cortisol metabolism, or use of illicit drugs * (4) use of hormone replacement therapy or hormonal contraceptives; * (5) a body mass index (BMI) \<18.5 or \>29.9 * (6) cigarette smoking * (7) chronic medical or psychiatric disease with potential to interfere with sexual function (e.g., chronic neurological disease, cardiac and liver disease, eating disorders, anxiety disorders) * (8) chronic pain with intercourse not relieved by a vaginal lubricant * (9) loss of genital responsiveness * (10) significant relationship discord * (11) not having a family physician who we could contact if depression is diagnosed during the assessment * (12) difficulty in complying with questionnaires or in completing interview.