Postpartum Hemorrhage, also known as PPH, is a medical condition characterized by the heavy, excessive bleeding from the vagina after childbirth. There are two types of PPH: Primary or Immediate PPH and Secondary or Delayed PPH. Primary PPH occurs when the bleeding starts within 24 hours of the baby's birth whereas secondary PPH is the bleeding that occurs after 24 hours, up to 6 weeks after giving birth. PPH is usually caused by insufficient uterine muscle contractions to constrict the blood vessels in the uterus, leading to excessive bleeding. Women suffering from endometritis (infection of the wall of the uterus) and retained placenta (a condition where the placenta remains in the uterus after the baby's birth) commonly have PPH. Immediate medical treatment must be given to stop the bleeding as PPH is a potentially life-threatening condition that may lead to complications, such as shock or even death.