The latest survey found there were more than 122 , 000 sperm injection treatments in europe in 2002 , compared with 113 , 000 in vitro fertilization , or ivf , treatments , pushing the proportion of injection up to 52 % of the total 最新披露的数据发现2002年欧洲共进行了122000例单精子穿刺手术， 113000例普通试管婴儿手术，单精子穿刺术的比例达到了52 % 。
Consequently , an excess number of otherwise normal pregnancies would be recommended to undergo definitive testing to ensure as many downs syndrome fetuses could be detected prenatally . however , conventional definitive genetic testing employs invasive methods , such as amniocentesis to obtain fetal tissue for testing , thus carrying a risk to the fetus 但传统的基因测试，例如羊膜穿刺术（俗称抽羊胎水）属入侵性诊断方法，即是要用针穿过母体进入子宫，抽取胎儿细胞，会为孕妇带来一定的风险（例如流产） 。
