Effects of an Alternative Treatment for Military Sexual Trauma on PTSD Symptoms, Neurosteroids and Brain Function

Inclusion Criteria: * Aged 18-65 * Status as a woman veteran * Receives care at the Durham VAMC * History of MST * DSM-IV diagnosis of PTSD, confirmed by CAPS interview * Able to participate in a research interview in English * Regular telephone access Exclusion Criteria: * Current diagnosis of organic or psychotic mental disorder * Suicidality or parasuicidality * Ongoing family violence * Alcohol or drug dependence within previous 3 months * Enrolled in cognitive-behavioral/exposure-based therapy during study period. * Supportive therapy and psychiatric medications (if stabilized at least 3 months prior to enrollment) are acceptable. * An uncontrolled medical condition Exclusion Criteria for the fMRI only: * Foreign metallic objects or implanted devices in the body incompatible with MRI * Positive pregnancy test as determined by serum ß-HCG level * Claustrophobia * CNS neoplasms or neurological conditions such as Parkinson's Disease, Huntington's Chorea, demyelinating diseases, seizures, hydrocephalus, etc.