Why do women choose abortion, or put a child up for adoption, or keep a baby? Because they are pregnant.
Why are they pregnant? Either sexual activity, artificial insemination (AI) or, immaculate conception. We know that the latter occurred once about 2,000 years ago, and will never again happen, to a woman whose name was Miryam, or Mary in English. AI is rare and usually occurs only when the other way to get pregnant doesn't work. So, since women are looking to get pregnant through AI, we can assume that abortion rates will be miniscule among AI pregnancies.
Therefore, the root cause of abortion is sexual activity. So, to reduce abortion, reduce sexual activity!
Is it ONLY the woman's responsibility to be abstinent? NO! To modify your question, "So in your view, men are not responsible for pregnancy?" If that is your position, that is very irresponsible and you are suggesting that we, men, cannot control our craven desires.
A responsible man ensures that no pregnancy occurs, unless the child will be wanted. Anything else is abdicating his God given responsibility as head of the household.
Brilliant analysis, all of it.