Neonatal adrenal hemorrhage (NAH) is frequently overlooked because the majority of cases are asymptomatic. In this study, we investigated the clinical symptoms, echographic characteristics and incidence of NAH from January 1998 to December 1999 at Cathay General Hospital, Taipei, Taiwan. Among 3273 newborns who had ultrasound screening, 18 cases were diagnosed as having NAH. The incidence was 0.55% which was compatible with other reports. But there was a female predominance (10:8) which was different from previous reports. Only one premature baby was diagnosed with NAH. No patients had perinatal asphyxia, and this was different from other reports. The mean birth body weight was 3530 grams which was more than the 75th percentile of normal term baby birth weight. Sixteen cases had right-sided NAH and two cases had left-sided NAH. Eleven cases (61%) within this study were asymptomatic. The incidence of pathologic jaundice was 11%. Four babies (22%) had poor oral feeding combined with vomiting. Only one had severe anemia for which blood transfusion was required. There were no cases of adrenocortical insufficiency in our study. Only one patient received adrenalectomy. In conclusion, NAH can be detected early by sonography and most cases require only supportive treatment. Thus, unnecessary surgery and severe complications due to delayed diagnosis can be avoided.