THIS MALE INFANT was born at 41 weeks' gestation to a 20-year-old, gravida 3, para 2 woman with an unremarkable medical history, normal prenatal test results, and no smoking, drug use, or other harmful habits. Pregnancy was complicated by decreased fetal movements during the last week of gestation. An ultrasound performed the morning before delivery revealed severe hydrocephalus. A previous ultrasound performed at the 20th week showed no abnormalities. The infant was delivered by emergency cesarean section without complications or need for resuscitation. Apgar scores were 7 and 9 at 1 and 5 minutes, respectively. His birth weight was 4054 g (>95th percentile for age), length was 51 cm (75th percentile), and head circumference was 40 cm (>95th percentile). He was transferred to the neonatal intensive care unit for further evaluation and management.