Unfortunately, whenever a pro-life issue comes up, the pro-aborts jump in, making wildly emotional claims that the initiative is about making birth control illegal and taking rights away from women.
Unfortunately, even people who are pro-life will vote pro-abortion if they believe that the pro-life vote will result in birth control being made illegal and rights stripped from women.
We need to hit them back with just as much emotionalism. I'm thinking, just start hysterically claiming that pro-aborts think the only purpose of women is to be cash cows for abortionists, they think women are stupid, they want all women to be murderers, etc. Emotionalism (not reason) gets through to low-information voters.
The main thing is to not let the pro-aborts get away with the wild claims that making abortion illegal also makes birth control illegal. The two issues are not related.