Keep in mind that something like 90% of the abortions in the pre-Roe period were done by doctors acting illegally. And most of the rest were done by others in the health professions, also operating illegally: nurse-midwives, PA’s, NP’s. Med students, too. I knew one.
After legalization, they just moved the door from the back alley to the street-front, and were able to advertise and get lots and lots of funding.