You assume "health reasons" to be "more life threatening", or that the fetus is showing signs of an anamoly that is life threatening when born.
I'm including how pregnancy changes a woman's body....her blood pressure, her blood sugar levels, her hormones, her digestive system....it's a health issue that is all-consuming for her. This is why when a woman goes in to see an OB/GYN for pre-natal care, her vitals are taken and the entire process is focused primarily on her health with the development of the fetus as secondary in the evaluations.
Again, you're reducing pregnancy down to an "inconvenience" (which I've pointed out before as being a far far cry from the reality) and which is a tactic many pro-lifers offer when wanting to shame women from making their own decisions about their own bodies.
I've been pregnant twice. I have given birth twice. I've raised these kids to adulthood. I also was pro-life for many years before I realized how my rhetoric was hateful and shaming of women, and I quickly changed my perspective to be more compassionate.
If I was pro-choice back then? I'd have chosen to carry the pregnancies to term and to do what I've been doing. I support women who choose to carry to term. If it's what they want to do, all the power to them.
If a woman seriously does not want to go through 9 months of her health being overwhelmingly altered, go through labor and delivery, and have to make a decision to keep the newborn or to go through the process of giving the newborn up for adoption, all the power to her. It's her body.
I've lived on this planet for a while, and I know plenty of women who have had abortions. The majority of them are quite content and are at peace with their decisions. But many of them don't want to discuss it with certain people around because they know they'll be confronted with the whole "you killed your baby" rhetoric, and it's not worth the time or their stomach acid.