Chinese Medical E-ournals Database

Chinese Journal of Obstetrics & Gynecology and Pediatrics(Electronic Edition) ›› 2018, Vol. 14 ›› Issue (02): 236 -240. doi: 10.3877/cma.j.issn.1673-5250.2018.02.018

Special Issue:

Original Article

Application value of single nucleotide polymorphism array testing applied to products of conception from miscarriage

Biheng Cheng1,(), Jianhua Chen1, Wanzhou Xu2   

  1. 1. Department of Obstetrics, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, China
    2. Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, China
  • Received:2017-11-14 Revised:2018-02-20 Published:2018-04-01
  • Corresponding author: Biheng Cheng
  • About author:
    Corresponding author: Cheng Biheng, Email:
Objective

To evaluate the application value of assaying the products of conception (POC) of miscarriage with single nucleotide polymorphism (SNP) array in the etiology analysis and genetic counseling of miscarriage.

Methods

A total of 143 pregnant women were chosen as study subjects.They were diagnosed as " embryos stop developing" by ultrasonography and terminated pregnancy from May 2016 to July 2017 in Renmin Hospital of Wuhan University. SNP-array was conducted to test the POC of these pregnant women, and characteristics of the chromosomal abnormalities of POC were summarized. Meanwhile, the constituent ratios of age at expected date of delivery (<35 years old and ≥35 years old) between pregnant women with and without POC chromosomal abnormality was compared by chi-square test. The study protocol was approved by the Ethical Review Board of Investigation in Human Being of Renmin Hospital of Wuhan University.Informed consent was obtained from each participant.

Results

①Among 143 singleton pregnancies, we obtained results of 128 eligible samples which met the requirements of SNP-array testing from 143 samples of POC, and the success rate of SNP-array testing for POC was 89.5%. SNP-array testing of POC showed that the proportion of chromosomal abnormalities was 57.0%(73/128), including 1 case (1.4%, 1/73) of structural abnormality of chromosome (1p36 micro-deletion), and 72 cases (98.6%, 72/73) of numerical abnormalities of chromosome. ②The types distribution of 72 cases of numerical abnormalities of chromosome were 59.7%(43/72) of trisomy, 18.1%(13/72) of monosomy, 13.9%(10/72) of triploidy and 8.3%(6/72) of mosaicism. ③The constituent ratios of age at expected date of delivery of <35 years old and ≥35 years old in pregnant women with POC chromosomal abnormality were 67.1%(49/73) and 32.9%(24/73), respectively, and were 80.0%(44/55) and 20.0%(11/55) in pregnant women without POC chromosomal abnormality, respectively, and there was no significant difference between pregnant women with and without POC chromosomal abnormality (χ2=2.618, P=0.106).

Conclusions

SNP-array testing for detecting the chromosomal abnormalities of POC from miscarriage can provide a basis of miscarriage etiology analysis, and also play a certain role in clinical genetic counselling and future pregnancy planning.

表1 73例自然流产妊娠产物染色体异常类型[%(n/n′)]
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