TY - CHAP M1 - Book, Section TI - Single Umbilical Artery A1 - Bianchi, Diana W. A1 - Crombleholme, Timothy M. A1 - D'Alton, Mary E. A1 - Malone, Fergal D. Y1 - 2015 N1 - T2 - Fetology: Diagnosis and Management of the Fetal Patient, 2e AB - Key PointsSingle umbilical artery (SUA) is one of the most common malformations found in humans.Color Doppler techniques have improved the ability to visualize vessels in the umbilical cord, particularly in a transverse view through the fetal bladder.Detailed sonographic evaluation of fetal anatomy is important to determine if SUA is isolated or associated with other anomalies.If isolated, fetal echocardiography should be considered, but karyotype is not indicated.If associated anomalies are present, fetal karyotype should be obtained, with trisomy 18 being the most commonly associated aneuploidy.SUA is associated with increased perinatal mortality, increased chance of IUGR, and slightly increased prematurity.If no additional anomalies are detected, postnatal urologic radiographic investigations are not indicated.For surviving infants, long-term prognosis is excellent. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/19 UR - obgyn.mhmedical.com/content.aspx?aid=1106400819 ER -