The stage of life in the womb has been getting shorter and shorter in terms of when the baby can be saved if the mother is at risk. That said, if the mother's life is genuinely AT RISK -- not in terms of "mental health" -- then that is when the issue becomes one between the mother, the father and the doctor, as far as I'm concerned.
Otherwise, also as far as I'm concerned, the baby is an innocent human life and if the mother won't value and protect it, then the law must.
With all due respect, I do not like your analogy; it involves adults and how they came to be where they are -- there is no doubt of how and why an unborn human is in utero.
I've been of the stance since about 12 years old (the day I became a Christian and life wasn't all about -me- anymore).. that an abortion should never happen. Even if it was a choice between the woman and the baby. Of course; it was a distant concept because I am a male and unable to be put in that position myself. Still; I knew right from wrong (based on all my core beliefs) and knew what was and was not acceptable.. and deciding that I was more important than a little baby.. just smelled five shades of rotten meat to me and I couldn't stomach the thought of it.
After getting married the conversation came up with my wife... and again after she became pregnant. We laid it right out on the table and without hesitation my wife agreed precisely with me... not a second hesitation.
I think the pivotal point in both our lives is from the point that we do not think we are the center of the universe. We know there is something greater than us and we have decided to subjugate our lives, or decisions, or souls to that.
I believe that people that have not made the decision to follow Christ, can't conceive of letting yourself die in order to save another helpless little life. Yes; it's contrary to instinct. Yes; it's against what is 'normal'.
Then again.. so is following Christ.
And I love not being normal.
Have you looked around and seen what normal is?