Comprehensive analysis of early pregnancy loss based on cytogenetic findings from a tertiary referral center

Molecular Cytogenetics

Xuemei Chen¹  Liangpu Xu¹  Xiaorui Xie¹  Linjuan Su¹  Meiying Wang¹  Linshuo Wang¹  Deqin He¹  Lin Zheng¹  Xiaoqing Wu² 

[1]Medical Genetic Diagnosis and Therapy Center of Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, No. 18 Daoshan Road, 350001, Fuzhou, Fujian, China

[2]Medical Genetic Diagnosis and Therapy Center of Fujian Provincial Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, No. 18 Daoshan Road, 350001, Fuzhou, Fujian, China

[3]Department of Laboratory Medicine, Fujian Medical University, No. 88 Jiaotong Road, 350002, Fuzhou, Fujian, China

关键词: Products of conception;    Chromosomal abnormalities;    Maternal age;    Live birth history;    Previous miscarriage;    Mode of conception;   

DOI  :  10.1186/s13039-021-00577-8

来源: Springer

【 摘 要 】

BackgroundPregnancy loss is one of the most common complications during pregnancy. Clinical consultation based on etiology analysis are critical for reducing anxiety and distress. This study aimed to perform a comprehensive analysis for products of conception (POC) in miscarriage based on genetic etiology and clinical information.MethodsA retrospective study was conducted according to cytogenetic findings of 1252 POC from spontaneous pregnancy loss over 11 years. The frequencies and profiles of chromosomal abnormalities were discussed according to the classification of women with different maternal ages, previous miscarriage history, normal live birth history, and different modes of conception.ResultsA total of 667 (53.2%) chromosomal abnormalities were observed, including 592 (47.3%) cases of numerical abnormalities, 38 (3.0%) cases of structural abnormalities, and 37 (3.0%) cases of mosaic aberrations. In women above 40 years of age, the rates of chromosomal abnormalities and viable autosomal trisomy were significantly higher than those in women with ≤ 29, 30–34, and 35–39 years of age (p < 0.05). The frequency of abnormal karyotype in women with normal live birth history was 61.1%, significantly higher than 52.5% in women without normal live birth history (p < 0.05). There was no significant differences among women without, with 1–2, and ≥ 3 previous miscarriages regarding the rate of abnormal karyotype (p > 0.05); viable autosomal trisomy was less common in women with ≥ 3 previous miscarriages than women with < 3 miscarriages. The frequency of chromosomal abnormalities was 49.0% and 55.0% in women with assisted conception and natural conception (p > 0.05), respectively; monosomy X was more frequently detected in women with natural conception than assisted conception.ConclusionThe frequencies and profiles of chromosomal abnormalities in early miscarriages are strongly associated with clinical information including maternal age, previous miscarriage, live birth history, and mode of conception. Cytogenetic analysis of POC should be recommended to women with a first miscarriage and women with normal live birth history.

【 授权许可】

CC BY