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
Murder of pregnant women among women ages 20 to 24 and fifth among women ages 25–34 in 1999. The top cause of death in both age groups is accidents. The Unborn Victims of Violence Act, passed in 2004, defines a fetus as a "child in uterus" and a person as being a legal crime victim "if a fetal injury or death occurs during the commission of a federal violent crime." In the U.S., 38 states have laws with more harsh penalties if the victim is murdered while pregnant. Some of these laws defining the fetus as being a person, "for the purpose of criminal