Fig. 4From: Ultrasound angiology reference standards of fetal cerebroplacental flow in normal Egyptian gestation: statistical analysis of one thousand observationsPI MCA/UA. Scattered diagram of gestational age individual measurement and calculated reference ranges for MCA PI/UA PI in normal pregnancies (1284 observations) with 1st–99th percentiles (blue lines) and 50th percentiles (red dashed line)Back to article page