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Isolated single umbilical artery and fetal karyotype.
Dagklis T, Defigueiredo D, Staboulidou I, Casagrandi D, Nicolaides KH.
Ultrasound Obstet Gynecol 2010;36:291-5. -
Single umbilical artery at 11-14 weeks' gestation: relation to chromosomal defects.
Rembouskos G, Cicero S, Longo D, Sacchini C, Nicolaides KH.
Ultrasound Obstet Gynecol 2003;22:567-70.