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先天性畸形分广义和狭义两种,广义指先天性代谢缺陷和器官形态构造异常;狭义则专指器官形态构造异常.据1987年我国人口统计,全年约有33.8万新生儿为畸形儿.先天性胎儿器官形态构造异常种类繁多,几乎所有系统均可受累.临床上除20%～30%合并羊水过多或羊水过少外,很少有临床表现。自超声检查应用于产前检查以来,胎儿畸形的检出率明显提高.我院自1982年起对妊娠18～20周的孕妇进行常规超声检查,至1991年6月共检查18～20周孕妇
Congenital deformity broadly and narrowly defined two kinds of generalized refers to congenital metabolic defects and organ morphogenetic abnormalities; narrow sense of the word refers to organ morphological abnormalities. According to our census in 1987, about 338,000 newborns throughout the year as deformed children. Congenital fetal organ morphogenetic abnormalities of a wide range, almost all systems can be affected .Clinical 20% to 30% with polyhydramnios or oligohydramnios, few clinical manifestations. Since the ultrasound examination applied to the prenatal examination, the detection rate of fetal malformations increased significantly.Our hospital since 1982 on pregnant 18 to 20 weeks pregnant women routine ultrasound examination, to June 1991 were examined 18 to 20 weeks pregnant women