产前筛查是指通过经济、简便和无创伤的检测方法 ,从孕妇群体中发现怀有某些先天缺陷胎儿的高危孕妇 ,以便进一步明确诊断 ,最大限度地减少异常胎儿的出生率。目前所说的产前筛查通常是通过母血清标志物的检测来发现怀有某些先天缺陷胎儿的高危孕妇 ,因此也可称作母血清产前筛 Prenatal screening refers to the discovery of high-risk pregnant women with some birth defects from a group of pregnant women through an economical, simple and non-invasive test to further confirm the diagnosis and minimize the birth rate of abnormal fetuses. The current prenatal screening is usually through the detection of maternal serum markers to detect high-risk pregnant women with some fetuses with congenital defects, it can also be called maternal serum prenatal screen