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本文表明绒毛膜活检(CVS)对于早期妊娠的产前诊断是安全准确的。1986~1992年,48个欧洲实验组对64 053例CVS进行
This article shows that chorionic villus biopsy (CVS) is safe and accurate for prenatal diagnosis of early pregnancy. From 1986 to 1992, 48 053 CVS were performed in 48 European experimental groups