Trisomy 21 Laura Hurtado, MD Article Published: May 24, 2002 A.M.M.B.A. OlavarrÃa, Argentina This 3rd trimester fetus with a single umbilical artery, right pleural effusion and a short femur. and the baby, after delivery with a simian crease, and the 2 vessels cord: Discussion Board Start a discussion about this article Add bookmark Bookmarked