Removal of the dead fetus is an called an abortion. Some of the numbers of abortions are fetus'es that died naturally in the womb.
Less than 1 percent of abortions take place after 21 weeks ( just past the 5 month mark).
Less than .08 take place after 24 weeks gestation.
These are the extreme cases.
They are the cases where the woman's life or irrepairable damage to a major bodily function would take place if the pregnancy were allowed to contine.
THey are cases where the fetus has died in the womb or is so malformed the fetus will be stillborn or will only live a few minutes or hours.