The direct method to obtain chromosome metaphase from human chorionic villi is a new method of early prenatal diagnosis.

绒毛膜细胞直接法制备染色体是一种新的早期产前诊断方法。

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The direct method to obtain chromosome metaphase from human chorionic villi is a new method of early prenatal diagnosis.

绒毛膜细胞直接法制备染色体是一种新的早期产前诊断方法。

youdao