Fig 1

This was a nested study in which the clinical records of 213 pregnant women who had consented to donate blood for biochemical research purposes during pregnancy were reviewed. Ob, obstetric; PTL, preterm labor (<37 completed weeks); FGR, fetal growth restriction; PIH, pregnancy-induced hypertension; GD, gestational diabetes; SAB, spontaneous abortion; IUFD, intrauterine fetal demise; LOF, loss of follow-up.