Pro-choice, without a doubt.
Historically, the pro-choice are the only ones who advocate and fund sex education, accessible birth control, pre-natal care, and child care. Pro-choice countries have seen their abortion rates fall over the decades, not because people are having less sex, but because people are having fewer unwanted or unsupportable pregnancies. Look at literally any country in the decade before they legalized abortion, and then 20 years after. The difference is obvious. The pro-choice movement is a truly inclusive movement of all choices, and as a result, pro-choice policy tends to better the outcomes of all women, regardless of their choice.
Historically, anti-choice policy is tightly correlated with restrictive access to birth control, a lack of safety net for poor mothers, and just a general lack of any health care for women at all, along with a culture that is somewhat rape-permissive. This should be obvious, since anti-choice policy is basically a type of chattel slavery, and anyone who sees women as chattel doesn't care much about their medical needs or their sexual consent. In these countries, abortion rates actually tend to rise, because unwanted pregnancy rates are so incredibly high, and women are not actually chattel -- they are people with their own independent will, and they will not stop aborting just because some patriarch tells them to. They just resort to illegal abortions instead, because ultimately the risks of doing so are less than the risks of being an impoverished possibly homeless mother, or being forever tethered to her rapist, or risking her life on a pregnancy her body cannot support. Look at Romania's anti-choice years, or modern-day Poland, if you want some examples. Both have astronomical abortion rates. Polish women are estimated to abort 50% of all pregnancies they ever have.