2Livak K J, Schmittgen T D. Analysis of relative gene expression data using real-time quantitative PCR and the 2 ( - Delta Delta C (T) ) method[J]. Methods, 2001, 25(4): 402-408.
3Henegariu O, Heerema N A, Dlouhy S R, et al. Multiplex PCR: critical parameters and step-by-step protocol[ J ]. Biotechniques, 1997, 23 (3) : 504 -511.
4Bryndorf T, Lundsteen C, Lamb A, et al. Rapid prenatal diagnosis of chromosome aneuploidies by interphase fluorescence in situ hybridization: a one-year clinical experience with high-risk and urgent fetal and postnatal samples [ J ]. Acta Obstet Gynecol Stand, 2000, 79 (1) : 8 - 14.
5O'Leary P, Breheny N, Dickinson J E, et al. First-trimester combined screening for Down syndrome and other fetal anomalies[ J]. Obstet Gynecol, 2006, 107(4): 869-876.
6Miura S, Miura K, Masuzaki H, et al. Microarray comparative genomic hybridization (CGH) -based prenatal diagnosis for chromosome abnormalities using cell-free fetal DNA in amniotie fluid[ J] . J Hum Genet, 2006, 51(5): 412-417.
7Yulug E, Yenilmez E, Unsal M A, et al. Apoptotic and morphological features of the umbilical artery endothelium in mild and severe preeclampsia[ J]. Acta Obstet Gynecol Scand, 2006, 85 (9) : 1038 - 1045.
8Helmy S M, lsmail S, Bassiouni R, et al. Sensitivity of DCSR3/ GAPDH ratio using quantitative real-time PCR in the rapid prenatal diagnosis for down syndrome [ J ]. Fetal Diagn Ther, 2009, 25 (2) : 220 - 223.
