先天性畸形是由于子宫内胎儿形成期中,机体在构造上发生了障碍,因此婴儿生下来就带有各种发育上的异常。先天性畸形是胎儿死亡,婴儿患病和死亡的主要原因之一,为此,引起了国内外高度的重视。据国外报导,可造成残废丧命的先天性畸形的总发生率为2.4%左右。在这些儿童 Congenital malformations are due to the formation of the fetus in the womb, the body in the structure of an obstacle, so the baby is born with a variety of developmental abnormalities. Congenital malformations are one of the main causes of fetal death, infant illness and death. Therefore, it has aroused great attention at home and abroad. According to foreign reports, the total incidence of congenital malformations that cause disability and death is about 2.4%. In these children