Fig. 2From: Zone-specific reference ranges of fetal adrenal artery Doppler indices: a longitudinal studySmoothed 5th, 50th and 95th percentile curves of the a) pulsatility index, b) resistance index and c) systolic/diastolic ratio for the inferior adrenal artery. Blue circles show individual observations. Fitted percentiles according to gestational age in weeks are presented as solid lines. The 95% CI of the fitted mean value is presented as a gray areaBack to article page