1Walknowska J, FA Conte, MM Grumbach. Practical and theoretical implications of fetal-maternal lymphocyte transfer[J].Lancet, 1969, 1 (7606) :1119-22.
2Chen XQ, et al. Microsatellite alterations in plasma DNA of small cell lung cancer patients[J].Nat Med, 1996,2 (9) : 1033-5.
3Lo YM, et al. Presence of fetal DNA in maternal plasma and serum[J].Lancet, 1997, 350 (9076) :485-7.
4Held CA, et al. Real time quantitative PCR[J].Genome Res, 1996,6 (10) :986-94.
5Lo YM, 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) :768-75.
6Wang E, et al. Gestational age and maternal weight effects on fetal cell-free DNA in maternal plasma[J].Prenat Diagn, 2013, 33 (7) : 662-6.
7ILo YM, et al. Maternal plasma DNA sequencing reveals the genome-wide genetic and mutational profile of the fetus[J].Sci Transl Med,2010,2 (61) :61ra91.
8Hui L, JI Vaughan, M Nelson. Effect of labor on postpartum clearance of cell-free fetal DNA from the maternal circulation[J]. Prenat Diagn, 2008,28 (4) :304-8.
9Bianchi DW. Circulating fetal DNA :its origin and diagnostic potential-a review[J].Placenta, 2004, 25 Suppl A :$93-S101.
10Sequencing-based tests to determine fetal down syndrome (trisomy 21 ) from maternal plasma DNA[J].Technol Eval Cent Assess Program Exec Summ, 2013,27 ( 10 ) .-1-6.
