Supplementary Material for: Large Umbilical Artery Aneurysm with a Live Healthy Baby Delivered at 31 Weeks Olog A. Thomas J.T. Petersen S. Cattanach S. Lourie R. Gardener G. 10.6084/m9.figshare.5121604.v1 https://karger.figshare.com/articles/dataset/Supplementary_Material_for_Large_Umbilical_Artery_Aneurysm_with_a_Live_Healthy_Baby_Delivered_at_31_Weeks/5121604 Umbilical artery aneurysm is a rare structural anomaly. We report a case of a large cord mass monitored closely with MCA PSV aiding the decision for delivery in an appropriately grown fetus. 2011-01-06 00:00:00 Cord mass Umbilical artery aneurysm Middle cerebral artery Doppler Fetal anemia