Herrmann UJ Sidiropoulos D 1988 In 450 patients with pregnancy at high risk for fetal malformation and/or intrauterine growth retardation, the umbilical cord was investigated sonographically for the presence of a single umbilical artery. A single umbilical artery was diagnosed in four fetuses between 23 and 33 weeks of gestation and suspected in two. Three cases were overlooked at sonography. All seven surviving fetuses had growth retardation at delivery and four also showed severe malformations. Whenever a single umbilical artery is found at sonography, further work-up is required to rule out associated anomalies, intrauterine growth retardation, or chromosomal abnormality. https://sonar.ch/global/documents/243269 eng info:eu-repo/semantics/altIdentifier/doi/10.1002/pd.1970080405 info:eu-repo/semantics/altIdentifier/pmid/3041402 Prenatal diagnosis. - 1988 Female Fetal Growth Retardation Humans Hydrocephalus Infant, Newborn Microcephaly Pregnancy Pregnancy Trimester, Second Prenatal Diagnosis Ultrasonography Umbilical Arteries Single umbilical artery: prenatal findings. http://purl.org/coar/resource_type/c_6501