2Shan D,Wei W,Jing, hui R, et al.Clinical application of massively parallel sequencing-based prenatal noninvasive fetal trisomy test for trisomies 21 and 18 in 11105, pregnancies with mixed risk fac- tors[J].Prenatal Diagnosis, 2012,32 : 1 -8.
4Jaunianx E, Brown R, Rodeck C, et al. Prenataldiagnosis of triploidly during the second trimester of pregnancy[ J]. Obstet Gynecol, 1996, 88(6) : 983 -989.
