Yes. Postpartum psychosis is the rarest of all types of postpartum disorder. It occurs at a rate of one to two out of every 1,000 deliveries. Symptoms usually occur within the first four weeks following delivery but can manifest anytime up to 90 days after delivery. It is characterized by rapid and severe onset. Women with this disorder are severely impaired and suffer from delusions and hallucinations—sometimes with command hallucinations to kill the infant or delusions that the infant is possessed—and are at risk for suicide and or infanticide.