why is there more chance of miscarriage in a woman with rh-(nega.) blood group
During pregnancy, red blood cells from the unborn baby can cross into the mother's bloodstream through the placenta. If the mother is Rh-negative, her immune system treats Rh-positive fetal cells as foreign substance and makes antibodies against the fetal blood cells. These anti-Rh antibodies may cross back through the placenta into the developing baby and destroy the baby's circulating red blood cells. When red blood cells are broken down, they make bilirubin. This causes an infant to become yellow (jaundiced). The level of bilirubin in the infant's bloodstream may range from mild to dangerously high. In severe cases the baby is choked inside the womb and thus lead to miscarriage.