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
Uterus transplantation organ transplant operation, including infection and organ rejection. Some ethics specialists regard the risks to a live donor, as opposed to a post-mortem donor, as being too great, and some find the entire procedure ethically questionable, especially since the transplant is not a life-saving procedure. In November 2017, the first baby was born after a uterus transplantation in the US. The birth occurred at Baylor University Medical Center in Dallas, TX, after a uterus donation from a non-directed living donor . India's first uterine transplant baby, weighing 1.45 kg, was delivered through a Caesarean section at Galaxy Care Hospital in