Extensive studies have not shown any increase in infant abnormalities after bleeding in early pregnancy. Bleeding may be due to a slight separation of the placenta from the wall of the womb as it grows, and it almost certainly does not involve the baby directly. About 30% of all pregnant women suffer from some degree of bleeding during pregnancy, and some have quite severe bleeds without losing the baby.
Bleeding in early pregnancy may also be a sign of an impending miscarriage. Unfortunately nothing except rest can help the mother in this situation. Doctors cannot usually prevent miscarriages once bleeding has started.
Other causes of bleeding in pregnancy include an ectopic pregnancy, significant separation of the placenta from the wall of the uterus (placental abruption), vaginal ulcers or erosions or hormonal imbalances.