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。

To investigate the prenatal ultrasound diagnosis (B ultrasound) sonographic characteristics of fetal congenital malformations，and provide information forclinical，timely termination of pregnancy for fetal malformation，the production of pregnant womenby ultrasonography，routine obstetric fetal system，measurement，observation of fetal malformation. 42 cases of fetal malformation，2 cases were missed diagnosis.conclusion. Fetal ultrasonography has important clinical value in diagnosis of malformation.