Fig. 1From: Application of non-invasive prenatal testing to 91,280 spontaneous pregnancies and 3477 pregnancies conceived by in vitro fertilizationFlow chart of the NIPT study. NIPT non-invasive prenatal testing, T21 trisomy 21, T18 trisomy 18, T13 trisomy 13, SCA sex chromosome aneuploidy, SP spontaneous pregnancy, IVF in vitro fertilization, n number, s singleton, t twin, TOP termination of pregnancy, SA spontaneous abortionBack to article page