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经腹羊水穿刺是一种对于母亲危险性低、胎儿诊断率高的遗传学产前诊断的好方法。然而,羊水穿刺术不能在孕中期前作出诊断,因此,孕18周前很少能知道胎儿核型。由于这个原因,发展孕早期产前诊断技术对孕妇和她的家庭有着重要的意义。 20年前曾报道过孕早期绒毛膜细胞培养实验研究,而直接分析法是在1983年才开始的。至今在世界各地有110个中心已做CVS(绒毛膜标本)细胞遗传学检查超过28000例。
Transabdominal amniocentesis is a good method for genetic prenatal diagnosis of low mothers’ risk and high fetal diagnostic rates. However, amniocentesis can not be diagnosed before the second trimester, so it is rare to know the fetal karyotype until 18 weeks gestation. For this reason, the development of early prenatal diagnostic techniques for pregnant women and her family is of great importance. Twenty years ago, it was reported that chick embryo culture in early pregnancy experimental study, and direct analysis was started in 1983. To date, more than 28,000 CVS (chorionic) cytogenetic tests have been performed in 110 centers around the world.