AIDS is another threat. Two percent of AIDS has been acquired by blood transfusions. With recent careful screening techniques, this is now much less. Even so, 200-400 people in developed countries, per year, are still being exposed via blood transfusions. In underdeveloped nations the AIDs threat ranges from seldom to common.
Blood clots are one of the causes of death to mothers who deliver babies normally.
They are also a cause of death in healthy young women who have abortions performed. Childbirth is a normal process, and the body is well prepared for the birth of the child and the separation and expulsion of the placenta. Surgical abortion is an abnormal process, and slices the unripe placenta from the wall of the uterus into which its roots have grown. This sometimes causes the fluid around the baby, or other pieces of tissue or blood clots, to be forced into the mother's circulation. These then travel to her lungs, causing damage and occasional death.