1Horacek J, Kuerova M. Biochemical screening in the second trimester of pregnancy from a genetic aspect [ J ]. Ceska Cynekol, 1999,64 (5) :302 -304.
2Wald NJ, Cuckle HS, Howard S, et al. Maternal serum screening for Dow 's syndrome in early pregnancy[ J]. Obstetrical & Gynecological Survey, 1989,44 (10) :736 - 737.
3Benn PA, Fang M, Egan JF, et al. Trends in the use of second trimester maternal serum screening from 1991 to 2003 [ J]. Genet Med, 2005 3(5) :328 -331.
1Horacek J.Biochemical screening in the second trimester of pregnancy from a genetic aspect[J].Ceska Gynekol,1999,64:302-304.
2Benn PA,Fang M,Egan JF.Trends in the use of second trimester maternal serum screening from 1991 to 2003[J].Genet Med,2005,7:328-331.
3Perenc M,Dudarewicz L,Kaluzewski B.Utility of the triple test in the detection of abnormalities of the feto-placental unit[J].Med Sci Monit,2000,6:994-999.
4Valerio D,Aiello R,Altieri V,et al.Maternal serum screening of fetal chromosomal abnormalities by AFP,UE3,hCG and free-beta hCG.Prospective and retrospective results[J].Minerva Ginecol,1996,48:169-173.
5Merkatz IR,Nitowsky HM,Macri JN.An association between low maternal serum alpha-fetoprotein and fetal chromosomal abnormalities[J].Am J Obstet Gynecol,1984,148:886-894.
6Phillips OP,Elias S,Shulman LP.Maternal serum screening for fetal Down syndrome in women less than 35 years of age using alpha-fetoprotein,hCG,and unconjugated estriol:a prospective 2-year study[J].Obstet Gynecol,1992,80:353-358.
7Rosen DJ,Kedar I,Amiel A.A negative second trimester triple test and absence of specific ultrasonographic markers may decrease the need for genetic amniocentesis in advanced maternal age by 60%[J].Prenat Diagn,2002,22:59-63.
8Liu SS,Lee FK,Lee JL,Pregnancy outcomes in unselected singleton pregnant women with an increased risk of first-trimester Down's syndrome[J].Acta Obstet Gynecol Scand,2004,83:1130 -1134.
9Tul N,Pusenjak S,Osredkar J.Predicting complications of pregnancy with first-trimester maternal serum free-betahCG,PAPP-A and inhibin-A[J].Prenat Diagn,2003,23:990-996.
6Chang YW, Chang CM, Sung PL, et al.An overview of a 30-year expedence with amniocentesis in a sigle tertiary medical center in Taiwan[J].Taiwan J Obstet Gynecol, 2012, 51 ( 2 ) :206- 211.