Congenital anomalies are common, but the possibility that maternal cancer increases the chance of having a child with a birth defect is not fully understood.

中文翻译：

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母体癌症与后代先天性异常的关联

先天性异常很常见，但母亲癌症是否会增加生出患有先天缺陷的孩子的机会的可能性尚不完全清楚。