胎儿泌尿生殖系统异常发生率14%～40%[1],虽然大多数泌尿生殖系统先天畸形不会对生命造成很大威胁,但双侧严重肾畸形这一致死性畸形发生率仍有10%[2]。因此,准确鉴别胎儿各种泌尿生殖系统畸形,了解其病因和预后,对降低出生缺陷率尤为重要。2009年1月-2012年5月,来我院产前检查的孕妇共 Fetal urogenital abnormalities occur in 14% ~ 40% [1], although most of the genitourinary system congenital malformations will not pose a great threat to life, but bilateral severe renal deformity, the incidence of fatal deformity is still 10% [2]. Therefore, accurate identification of fetal genitourinary system deformity, to understand its etiology and prognosis, to reduce the birth defect rate is particularly important. January 2009 - May 2012, came to our hospital prenatal examination of pregnant women