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九个研究中心协同研究了1,040个妇女在经羊水穿刺后怀孕的后果,对照组为992人。试图就母亲年龄、种族和其它特征与对照组做一比较。发现最明显的区别是羊水穿刺组有53.4％年龄在35岁以上,而对照组超过35岁者仅34.9％。接着对这些的新生儿和一岁儿童作了检查。最重要的发现是:羊水穿刺组胎儿的丢失(自发流产和死产)为3.5％(36例),而对照组为3.2％(32例)。就羊水穿刺无从察觉的先天性畸形而言,例如新生儿疾病或在一岁时起病的疾患,两组之
Nine research centers collaborated to investigate the consequences of pregnancy after 1,040 women had received amniocentesis compared with 992 in the control group. An attempt was made to compare the mother’s age, race and other characteristics with the control group. The most obvious difference was found in 53.4% of those in the amniocentesis age group over 35 years of age, compared with 34.9% of those in the control group over 35 years of age. Then check these newborns and one-year-olds. The most important finding was that fetal loss (spontaneous abortion and stillbirth) in amniocentesis was 3.5% (36 cases) compared with 3.2% (32 cases) in the control group. Amniocentesis in the unidentified congenital malformations, such as neonatal disease or disease onset at the age of one, two groups of