Amniotic fluid phosphatidylglycerol and real-time ultrasonic cephalometry.


The fetal biparietal diameter (BPD) was measured at the time of real-time ultrasound-directed amniocentesis in 159 cases and a phospholipid profile was obtained from the amniotic fluid. BPD measurements of 9.0, 8.7, and 9.2 cm were then compared with a lecithin/sphingomyelin (L/S) ratio greater than or equal to 2.0 for the ability to predict the presence of… (More)


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