Fig. 1From: Clinical performance of non-invasive prenatal served as a first-tier screening test for trisomy 21, 18, 13 and sex chromosome aneuploidy in a pilot city in ChinaFlowchart of non-invasive prenatal test (NIPT) results and clinical outcome of pregnant womenT21: trisomy 21; T18: trisomy 18; T13: trisomy 13; SCA: sex chromosomal aneuploidiesBack to article page