I suppose what you're looking at medically is that a tmfr post 24 weeks effectively is an induction where the child is unlikely to survive birth, or the neonatal period, or have such a poor quality if life that survival without medical intervention is not possible.
If the baby is healthy, and it's a maternal choice post 24 weeks, induction then will result in a live birth, depending on how close to term they are.
So the woman goes through birth regardless. If the t is not fmr, the child could have a healthy life following adoption. She has to go through birth, but if she really doesn't want a baby then surely adoption if preferable to termination?