"On the political and legal level, the change agents had to make short work, at least in France, of the 1920 law that sought to prevent the lowering of birth rates by for-bidding the sale and advertising of birth control devices. Dr. Simon wrote: "To attack the law in its totality meant to liberalize abortion. {Public} opinion, however, was not yet ready for that. Therefore we had as our first goal to take apart this amalgam. Once contraception was common and accepted by law, then abortion would be accepted. The future proved us right."
January 1, 1970
https://en.wikiquote.org/wiki/Christian_views_on_birth_control