To investigate the prenatal ultrasound diagnosis (B ultrasound) sonographic charac-teristics of fetal congenital malformations,and provide information forclinical,timely termina-tion of pregnancy for fetal malformation,the production of pregnant womenby ultrasonogra-phy,routine obstetric fetal system,measurement,observation of fetal malformation. 42 cases of fetal malformation,2 cases were missed diagnosis.conclusion. Fetal ultrasonography has im-portant clinical value in diagnosis of malformation.%探讨产前超声检查(B超)诊断先天性胎儿畸形的声像图特征，为临床提供信息，对畸形胎儿及时终止妊娠。对产检的孕妇，按产科常规进行胎儿系统的超声检查，测量有关数据，观察胎儿有无畸形。结果发现，胎儿畸形42例，漏诊2例。超声检查对诊断胎儿畸形有着重要的临床价值。
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