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过去只有等到孩子出生之后父母才能发现孩子是否具有悲剧性的遗传缺陷。为此胎儿检查技术有了两个突破:首先是羊膜穿刺,这在怀孕的第15周就可鉴别胎儿是否异常;二是通过绒膜绒毛取样在怀孕的第10周进行检查。两种方法虽然都没有危险性,但是一旦确定出存在遗传缺陷就迫使即将为人父母的夫妇作出无奈的选择。要么抚养一个可能具有严重先天性缺陷的孩子,要么去经受流产的痛苦。现在借助新技术,可能把有缺陷基因遗传给后代
In the past, only after the child was born can parents find out if the child has a tragic genetic defect. To do this, there are two breakthroughs in fetal examination: the first is amniocentesis, which identifies whether the fetus is abnormal during the 15th week of pregnancy and the second is the examination of the first 10 weeks of pregnancy through sampling of chorionic villi. Although both methods are not dangerous, determining the presence of genetic defects compels the soon-to-be-married couple to make the futile choice. Either raise a child who may have a serious congenital defect or go through the pain of a miscarriage. With the help of new technologies, defective genes can now be passed on to future generations