Anonymous wrote:Not a doctor, but I'll play: First, this is only happening with a person who is morbidly obese. So, chances are they were carrying more weight than the circulatory system could handle in the first place, so they likely were experiencing heart and blood pressure issues due to the excess weight. Losing it would alleviate those problems, bringing the body closer to a level that the organs can actually handle.
Consider also that at the time of delivery, a pregnant woman's blood volume has increased by 50%, and returns to normal during the postpartum period, not all due to blood loss in delivery. So the body is equipped to handle this rapid and dramatic change in weight and blood volume (though it can be dangerous for women with underlying cardiac problems).
Can't it also be dangerous for women delivering multiples because they have even more extra blood? I remember hearing the story of a mom with triplets or quadruplets who went in cardiac arrest after delivery because she didn't lose enough blood during delivery and her body couldn't handle it.