Giving birth to a new baby is about more than just active labor, contractions and pushing. For the last 40 weeks, the baby has survived in the womb thanks to the placenta. This blood rich pseudo-organ must pass out of the vagina after the baby. But before it can pass, it must first detach from interior uterine tissue. Contractions will continue as the placenta detaches and moves through the vaginal canal and out the vagina.