1) Lo YM, Corbetta N, Chamberlain PF, et al : Presence of fetal DNA in maternal plasma and serum. Lancet 350 : 485─487, 1997
2) Sekizawa A, Kondo T, Iwasaki M, et al : Accuracy of fetal gender determination by analysis of DNA in maternal plasma. Clinical chemistry 47 : 1856─1858, 2001
3) Finning K, Martin P, Summers J, et al : Effect of high throughput RHD typing of fetal DNA in maternal plasma on use of anti-RhD immunoglobulin in RhD negative pregnant women : prospective feasibility study. Bmj 336 : 816─818, 2008
4) Saito H, Sekizawa A, Morimoto T, et al : Prenatal DNA diagnosis of a single-gene disorder from maternal plasma. Lancet 356 : 1170, 2000
5) Papageorgiou EA, Karagrigoriou A, Tsaliki E, et al : Fetal-specific DNA methylation ratio permits noninvasive prenatal diagnosis of trisomy 21. Nature medicine 17 : 510─513, 2011
6) Lo YM, Tsui NB, Chiu RW, et al : Plasma placental RNA allelic ratio permits noninvasive prenatal chromosomal aneuploidy detection. Nature medicine 13 : 218─223, 2007
7) Ghanta S, Mitchell ME, Ames M, et al : Non-invasive prenatal detection of trisomy 21 using tandem single nucleotide polymorphisms. PloS one 5 : e13184, 2010
8) Chiu RW, Chan KC, Gao Y, et al : Noninvasive prenatal diagnosis of fetal chromosomal aneuploidy by massively parallel genomic sequencing of DNA in maternal plasma. Proceedings of the National Academy of Sciences of the United States of America 105 : 20458─20463, 2008
9) Palomaki GE, Deciu C, Kloza EM, et al : DNA sequencing of maternal plasma reliably identifies trisomy 18 and trisomy 13 as well as Down syndrome : an international collaborative study. Genetics in medicine : official journal of the American College of Medical Genetics 14 : 296─305, 2012
10) Yotsumoto J, Sekizawa A, Koide K, et al : Attitudes toward non-invasive prenatal diagnosis among pregnant women and health professionals in Japan. Prenatal diagnosis 32 : 674─679, 2012
11) Wallerstein R, Strmen V, Durcan J, et al : Factors in decision making following genetic counseling for pre-natal diagnosis of de novo chromosomal rearrangements. Clinical genetics 69 : 497─503, 2006
12) Weil J : Non directive counseling, risk perception, and decision making. New York : Oxford University press, Inc, 2000