In our area, the Catholics aren’t involved in any pro-life events or organizations. It’s the Presbyterians and Baptists who organize the March For Life every year, fund and support the pro-life resource centers as budget line items, and help pregnant mothers in other ways. Nary one Catholic to be seen.
It seems to depend on how strong a person’s faith is...
I was involved with both Catholic and Protestant churches for many years. The devout Catholics and Evangelical Christians were pro-life, whereas the mainstream Protestants and so-called “cafeteria Catholics” were a mixed bag.
Around here, the Catholic churches have always been more actively involved in pro-life issues, from protesting abortion clinics to counseling pregnant women. Every Catholic church where I went had a pro-life group.
Overall, the Evangelical Christians were not as focused on the issue. Their churches focused more on other issues.
Some atheists are pro-life. I remember a few on this forum in the early days, especially one who posted about it all the time. If you strongly believe there is no afterlife, well...