A lot of these abortion advocates believe that if a baby isn't perfectly healthy, it should be aborted. For example, if a doctor says a baby won't survive outside the womb, then they believe the baby should be aborted. How can that doctor, or anyone, be 100% sure the baby won't survive outside the womb unless they give it a chance to survive outside the womb? It may surprise them. Many people have survived injuries that doctors believed would certainly kill them. like Staff Sergeant Henry Erwin during World War II.
https://en.m.wikipedia.org/wiki/Henry_E._Erwin