Umbilical cord is used in place of a bone marrow transplant in the treatment of blood disorders such as leukemia, with donations released for transplant through one registry, Netcord.org, passing 1,000,000 as of January 2013. Cord blood is used when the patient cannot find a matching bone marrow donor; this "extension" of the donor pool has driven the expansion of public banks. The umbilical cord in some mammals, including cows and sheep, contains two distinct umbilical veins. There is only one umbilical vein in the human umbilical cord. In some animals, the mother will gnaw through the cord, thus separating the placenta
Jewish women in the Holocaust and emotionally. Once labor was over and the baby was born, the women vulnerable to being killed along with their baby. One memoir describes some of the sadistic acts, which were performed among those who were pregnant: "SS men and women amuse themselves by beating pregnant women with clubs and whips, [being] torn by dogs, dragged around by the hair and kicked in the stomach with heavy German boots. Then when [the pregnant Jewish women] collapsed, they were thrown into the crematory-alive." Several Jewish women who wrote their own memoirs reflecting on the Holocaust reported there being a double jeopardy