For the Postpartum Depression and Maternal Mental Health Oral History Project. Barbara L. Parry is a professor of psychiatry focused on women's mood disorders, especially postpartum depression and premenstrual disorders. She discusses her training and early research in the field, her work with light therapy and with sleep and circadian rhythms, and her time at the National Institutes for Health. She also discusses the American Psychiatric Association and the DSM-IV, with its fight over the diagnosis of postpartum mood disorders, including discussion of Robert Spitzer and Allen Frances. Parry also discusses her involvement in the Marcé Society, beginning in 1984, and her introduction to James Hamilton.