Contingent Screening for Small by Weight for Gestational Age Neonates

Effective screening for small for gestational age neonates (SGA), in the absence of preeclampsia, can be accomplished using a contingent screening method. The basis for the contingent model is a combined assessment at 19-24 weeks gestation to stratify patients according to their risk. We can then identify prenatally over 90% of SGA neonates for a false positive rate of 10%.