Aberrant right subclavian artery in Down syndrome fetuses: a systematic review and meta-analysis. Ultrasound Obstet Gynecol Posted on 7 January 201510 February 2020 by admin Scala C, Leone Roberti Maggiore U, Candiani M, Venturini PL, Ferrero S, Greco T, Cavoretto P. Aberrant right subclavian artery in Down syndrome fetuses: a systematic review and meta-analysis. Ultrasound Obstet Gynecol 2015;46:266-76.https://obgyn.onlinelibrary.wiley.com/doi/full/10.1002/uog.14774