1Handyside AH, Kontogianni EH, Winston RM, et al. Pregnancies from boipsied human preimplantation embryos sexed by Y-specific DNA amplification [ J ]. Nature, 1990,344 ( 6268 ) :768-770.
2Lo YM, Corbetta N, Chamberlain PF, et al. Presence of fetal DNA in maternal plasma and serum [J]. Lancet, 1997,350(9076) :485- 487.
3Lo YM, Tein MS, Lau TK, et al. Quantitative analysis of fetal DNA in maternal plasma and serum: implications for noninvasive prenatal diagnosis [J]. Am J Hum Genet, 1998,62(4) :768-775.
4Lo YM. Molecular testing of urine: catching DNA on the way out [J]. Clin Chem, 2000,46(8 Pt 1 ) :1039-1040.
5Honda H, Miharu N, Ohashi Y, et al. Successful Diagnosis of fetal gender using conventional PCR analysis of maternal serum [ J]. Clin Chem, 2001,47( 1 ) :4146.
7Spencer K, de Kok JB, Swinkels DW. Increased total cell-free DNA in the serum of pregnant women carrying a fetus affected by trisomy 21 [J]. Prenat Diagn, 2003,23(7) :580-583.
8Farina A, LeShane ES, Lambert-Messerlian GM, et al. Evaluation of ceU-free fetal DNA as a second-trimester matenlal serum marker of Down syndrome pregnancy [ J ]. Clin Chem, 2003,49 ( 2 ) : 239- 242.
9Wataganara T, LeShane ES, Farina A, et al. Maternal serum cellfree fetal DNA levels are increased in cases of trisomy 13 but not trisomy 18 [J]. Hum Genet, 2003,112(2) :204-208.
10Cotter AM, Martin CM, Oleary JJ, et al. Increased fetal DNA in the maternal circulation in early pregnancy is associated with an increased risk of preeclampsia [ J]. Am J Obstet Gynecol, 2004,191 (2) :515-520.
