The placenta is an organ that supports the fetus by joining its blood vessels to those of the mother. While in the womb, the developing fetus receives oxygen and nutrients through the placenta. After the baby is delivered, the health care provider cuts the umbilical cord, which attaches the baby to the placenta. Within thirty minutes, the placenta peels away from the wall of the uterus and follows the same path the baby just took out of the mother's body. However, complications can arise that keep the placenta from being delivered normally and cause the area where the placenta was attached to bleed.