Fig. 1.

Distribution of subjects amongst low- and high-risk groups and their subsequent pregnancy outcomes. Low risk, healthy women with low risk of developing pregnancy complications; high risk, women with high risk of developing pregnancy complications; Low risk normal (LRN), pregnancies with clinically normal outcomes from the low-risk group; High risk normal (HRN), pregnancies with clinically normal outcomes from the high-risk group; adverse, pregnancies with adverse outcome; PEIUGR, PE and/or IUGR outcome; OAO, other adverse outcome i.e. other than PE or IUGR, e.g. gestational hypertension and gestational diabetes.