[Application of fetal DNA in maternal plasma for non-invasive prenatal diagnosis of fetal sex].
To investigate the feasibility and possibility of application of fetal DNA from maternal plasma for noninvasive prenatal diagnosis of fetal sex, plasma DNAs in blood samples of 73 pregnant women at the gestational period of 26 to 41 weeks were extracted by column separation and nested polymerase chain reaction were employed to amplify the SRY gene. A comparison was made between the amplification results and the real sex of the fetus after their delivery. The concordance rate of SRY gene amplification results of plasma free DNA with real fetal sex was 91.78% (67/73), the sensitivity rate was 97.37% (37/38), and the specific rate was 85.71% (30/35). The cell-free fetal DNA in maternal blood can be one of the valuable material sources for noninvasive prenatal diagnosis and the method of nested PCR could be useful for fetal sex determination. The specific rate of the test was 91.78%. It is of significance to prevent sex-linked inheritant diseases.
Chen
Zhen-Bin
ZB
The Laboratory of Electron Microscopy of Fujian Medical University, Fuzhou 350004, China. czb86233@163.com
Yan
Mei
M
Lei
Zhen
Z
Xiao
Bai
B
Liang
Yan
Y
Zhu
Zhang-Ling
ZL
Huang
Li-Jia
LJ
Liu
Jing-Zhong
JZ
D000328:Adult; D004247:DNA / Q000097:blood / Q000235:genetics*; D005260:Female; D005333:Fetus / Q000378:metabolism*; D006801:Humans; D016133:Polymerase Chain Reaction; D011247:Pregnancy; D011262:Pregnancy Trimester, Second / Q000097:blood; D011263:Pregnancy Trimester, Third / Q000097:blood; D012732:Sex Determination Analysis / Q000379:methods*; D051876:Sex-Determining Region Y Protein / Q000235:genetics*
D051876:Sex-Determining Region Y Protein; D004247:DNA