postpartum psychosis,puerperal psychosis,postpartum depression

Postpartum psychosis usually occurs in about 1 to 4 out of every 1,000 births, according to the U.S. Department of Health and Human Services. Postpartum psychosis is defined as, "an episode of psychosis, either depressive or schizophrenic, after childbirth, says Mosby’s Medical, Nursing, and Allied Health Dictionary.