Now you are just being obtuse.
According to the Centers for Disease Control and Prevention, about 1.3 percent of abortions were performed at or greater than 21 weeks of gestation in 2015. In contrast, 91.1 percent were performed at or before 13 weeks and 7.6 percent at 14 to 20 weeks.
Jen Villavicencio, an obstetrician-gynecologist in the Midwest, explained that, in the vast majority of cases in which a woman becomes seriously ill late in pregnancy, doctors are working to save both the woman and the fetus. But in rare situations, it’s clear the fetus will not survive, and then the patients and their loved ones must make a decision about whether to put a sick woman at further risk with a delivery.
Sometimes the fetus has a serious abnormality that hasn't shown up earlier and means it won't survive.