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
Prolapse in the integrity of connective tissue in the posterior or anterior vaginal walls, respectively, resulting in pelvic floor prolapse. Symptoms may include a feeling of pressure in the pelvis, or the visible protrusion of organs from the vagina. Prolapse is almost never painful, but the change in position of organs may cause urinary or bowel symptoms. Pessaries are a treatment option for pelvic organ prolapse. Umbilical cord prolapse occurs when the umbilical cord comes out of the uterus with or before the presenting part of the fetus. It is a relatively rare condition and occurs in fewer than 1% of