This scar tissue may block the fallopian tubes, either partially or completely. If the tubes are completely blocked, conception is impossible. If the tubes are partially blocked, sperm may pass through the fallopian tubes and fertilize an ovum, but the fertilized egg is then unable to leave the tube and move into the uterus. As it grows in the fallopian tube it becomes very painful. If it is not removed surgically, the tube will burst, resulting in internal hemorrhaging and death.
Studies show that women who have abortions have a higher number of tubal pregnancies.
One final complication that is reported in about one percent of suction abortions is perforation of the uterus. During pregnancy the uterus becomes softer, and therefore it is easier for an instrument to cut right through its wall. This weakens the muscular structure of the uterus. Sometimes the damage is so extensive and bleeding so hard to stop that emergency removal of the uterus is necessary. If the uterus is removed, it is impossible for the woman to carry a child again.