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Application of chromosome microarray analysis in thickening of transparent layer of fetal neck |
DING Xiaorui1 LIU Aiju2▲ YANG Xiaoyan2 ZHANG Junhui2 |
1.Graduate School, Inner Mongolia Medical University, Inner Mongolia Autonomous Region, Hohhot 010000, China;
2.Department of Obstetrics and Gynecology, Inner Mongolia Maternal and Child Health Hospital, Inner Mongolia Autonomous Region, Hohhot 010000, China |
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Abstract Chromosomal microarray analysis (CMA) is a newly developed prenatal diagnosis technology, which has been widely used due to its huge advantages. Its advantages are Kb level resolution, high sensitivity and specificity, high degree of automation and high efficiency etc., it can not only detect chromosome number and unbalanced structural abnormalities, but also detect copy number variation (CNV) caused by unbalanced rearrangement at the level of chromosomal sub microstructure. Therefore, it has gained favor in clinical detection, become the tool of clinical genetic routine diagnosis, and has been introduced into prenatal fetal genetic disease detection. The measurement of nuchal translucency (NT) has been widely used as one of the routine screening items in early pregnancy. Many studies have found that NT thickening is a sensitive index of fetal chromosomal abnormalities. CMA has been used as a first-line diagnostic technique for prenatal genetic screening. In the detection rate of chromosomal abnormalities when NT abnormality is detected by ultrasound, CMA is significantly higher than that of conventional karyotype analysis. However, it is not clear whether CMA can be used as a first-line detection method for prenatal diagnosis. In application, it is necessary to pay special attention to the explanation and inheritance of gene CNV of clinical significance consultation. In this paper, we will review the application, advantages and challenges of microarray analysis in the thickening of NT.
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