(Abstracted from Am J Perinatol 2019;36:422–427)
Vasa previa is defined as fetal vessels that run through the fetal membranes, over or within 2-cm distance from the endocervical os and unprotected by the placenta or umbilical cord. Vasa previa is associated with a high fetal or neonatal mortality rate due to risk of fetal exsanguination resulting from the fetal vessels tearing when rupture of membranes occurs.
Department of Obstetrics and Gynecology, Sheba Medical Center, Tel-Hashomer, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.F.B., H.I., E.K., R.Y., Y.Y., S.M.-T.); Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UT Health), Houston, TX (B.M.S.); and Department of Neonatology, Sheba Medical Center, The Edmond and Lily Safra Children's Hospital, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (S.K., I.S.E.)