Using the transcranial Doppler technique we studied the cerebral blood flow velocity in the middle cerebral artery on the first postnatal day in healthy term newborns. The cerebral blood flow velocity values were compared to various physiologic parameters to assess any correlation. No significant correlation was observed between cerebral blood flow velocity and hematocrit, blood glucose, bilirubin, simultaneous heart rate, mean arterial blood pressure, birth weight, or gestational age.