郑州大学人民医院, 河南 郑州 450000
摘要:目的:分析羊水染色体核型分析联合CMA检测在高龄孕妇产前诊断中的应用价值。方法:回顾性分析2022年6月至2023年6月在河南省人民医院医学遗传研究所就诊,并行产前诊断的高龄单胎孕妇450例,获取胎儿羊水样本并进行胎儿染色体核型分析及CMA检测。结果:450例高龄孕妇均行胎儿染色体核型分析,单独行胎儿染色体核型阳性检出率为6%(27/450)。27例阳性染色体中数目异常17例(62.96%,17/27),最常见的为21-三体(64.71%),其次为性染色体异常(29.41%);结构异常8例(29.63%,8/27),非结构性重排(50%)多于平衡性结构重排(12.5%),染色体多态性3例(37.5%);嵌合体2例(7.41%,2/27)。150例同时行胎儿染色体核型分析及CMA检测,联合检测染色体阳性检出率为13.3%(20/150),发现18例致病性拷贝数变异,2例意义不明确变异。结论:羊水染色体核型分析联合CMA检测,可提高高龄孕妇产前诊断中的染色体异常检出率,为胎儿宫内转归和遗传咨询提供遗传学依据,对于降低胎儿出生缺陷具有很高的临床应用价值,值得进一步推广。
关键词:染色体核型分析;CMA;高龄孕妇;产前诊断;应用价值
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