1Lubusky M,Dhaifalah I,Prochazka M,et al.Single umbilical artery and its siding in the second trimester of pregnancy:relation to chromosomal defects[J].Prenat Diagn,2007,27(4):327-331.
5Gornall AS, Kurinczuk JJ, Konje JC. Antenatal detection of a single umbilical artery: does it matter ? [ J]. Prenat Diagn, 2003, 23:117-123.
6Meng-Hsing W, Fong-Ming C,Meng-Ru S, et al. Prenatal sonographic diagnosis of single umbilical artery [ J ]. Clin Ultrasound, 1997, 25:425-430.
7Persutte WH, Hobbins J. Single umbilical artery: a clinical enigma in modern prenatal diagnosis [ J]. Ultrasound Obstet Gynecol, 1995, 8:216-229.
8Rembouskos G, Cicero S, Longo D, et al. Single umbilical artery at 11-14 weeks'gestation., relation to chromosomal defects [ J]. Ultrasound Obstet Gynecol, 2003, 22: 567-570.
9Geipel A, Germer U, Welp T, et al. Prenatal diagnosis of single umbilical artery: determination of the absent side, associated anomalies, Doppler findings and perinatal outcome [ J ]. Ultrasound Obstet Gynecol, 2000, 15 : 114-117.
10Patel S, Suchet I. The role of color and power Doppler ultrasound in the prenatal diagnosis of sirenomelia [ J ]. Ultrasound Obstet Gynecol, 2004, 24: 684-691.