(OOC: DBWI, surely?)
Well, first things first, there wouldn't have been those hundreds of deaths, which would have a profound butterfly effect.
More broadly, this means practical, non-invasive safe and easy birth control nearly two decades earlier than OTL. Which suggests that the sexual revolution of the late 80s might instead happen in the early 60s! Or it might not, society was a lot less liberal back then anyway...
One unlikely side-effect could be a reduction of the ubiquitousness of abortion. I mean, if a pre-emptive, pharmacutical alternative is available, people will be a lot more judgmental of women who abort their pregnancies.