The purpose of this study was to assess the prevalence and correlates of acute stress disorder (ASD) and posttraumatic stress disorder (PTSD) in mothers and fathers, and postpartum depression (PPD) in mothers, of infants in the Neonatal Intensive Care Unit (NICU). 86 mothers and 41 fathers completed measures of ASD and of parent perception of infant medical severity 3-5 days after the infant's NICU admission (T1), and measures of PTSD and PPD 30 days later (T2). 35% of mothers and 24% of fathers met ASD diagnostic criteria at T1, and 15% of mothers and 8% of fathers met PTSD diagnostic criteria at T2.