TY - EJOUR T1 - Coiling characteristics of umbilical cords in breech vs. vertex presentation AU - Ochshorn, Yifat AU - Bibi, Guy AU - Ascher-Landsberg, Jessica AU - Kupferminc, Michael J. AU - Lessing, Joseph B. AU - Many, Ariel PY - 2009 LA - und PB - Kooperation de Gruyter JO - Journal of Perinatal Medicine DO - 10.1515/JPM.2009.095 ER -