Raymond B. answered 12/24/20
Math, microeconomics or criminal justice
Legally, in Roe v. Wade, the argument was the right to privacy. Even some supporters of pro choice find that basis a little weak, legally. The Supreme Court referred to the 4th Amendment and a "penumbra" a shadow that it cast, creating a woman's right to privacy. Clearly, for originalists or textual interpretation of the 4th Amendment and Bill of Rights, there is no right to an abortion. Still the pro choicers support abortion on other grounds, perhaps the Equal Protection Clause of the 14th Amendment.
The right to live is a major part of the "right to life, liberty and the pursuit of happiness." But there's some conflict between the unborn's right to life and the woman's liberty and pursuit of happiness as well as the woman's right to privacy.
Still, if a woman killed a new born baby in the "privacy" of her bedroom or at the advice of a medical doctor, telling her there were major birth defects, today that would be murder, even though the new born baby is virtually the same in all respects to the fetus just before birth.
A real "right to choose" does seem to require informed consent, including telling the woman the more current state of science as to the fetus' status, heart beat, ability to feel pain and other relevant factors. We should have laws protecting the fetus from pain, at least as much as we have laws against animal abuse banning inflicting pain on animals.
Another factor in a real "right to choose" is informing the prospective mother that adoption is an alternative. If she doesn't want the child, due to rape, financial problems, incest or other reasons, she could just put the baby up for adoption. We federally fund abortion, so to equalize the choice, maybe we should finance adoption including pay for the birth and related expenses.
Men seem more interested in a woman's right to choose than many women. Men want to avoid child support for 18 years, and abortion is far cheaper. If men are paying for the abortion that seems like an undue influence, a bribe to influence unfairly the woman's right to choose. Maybe more enforcement of the state and Attorney General tracking down deadbeat dads to pay child support would help the woman more fairly choose, knowing the baby would be less of a financial burden. She'd get welfare if needed, and the state would go after the father to get reimbursed.
There's also the aspect of childless couples seeking to adopt and a major shortage of children in the US to be adopted. So these couples go overseas to "buy" babies, from China, Russia, Central America and other places, paying upwards of $30,000+. Meanwhile, a similar transaction in the US would be considered "baby selling" and a crime. Yet, if a mother in the US knew she could sell her baby for $30,000 that would be viewed more favorably than doing an abortion. With the right financial incentives, the "right to choose" could lean more towards adoptions than abortions. While also keeping more money in the US economy than going overseas.