The third stage of labor has traditionally been defined as the time between the birth of the baby and the delivery of the placenta and membranes. It is the third stage that is the most perilous for the woman because of the risk of postpartum hemorrhage.
Because you could be a mere 100 lbs and still have a high body fat ratio. Transversely, you could weight 300 lbs and have a low body fat ratio. Hope this helped :)
