WTF

It's important to not let the other side frame the debate. You shouldn't debate to convince them. That's practically impossible. How many times have you seen a zealot (religious or otherwise) change their mind due to argument? For me, I would say "absolutely never".

Instead, you should argue for third parties watching the debate. Don't let them set the ground rules as "Is a fetus a human life? Yes or no?" Let them argue "the right to life of a fetus" vs. "the right to control your own body". That's what the debate is really about, after all. Let people make an informed decision based upon the merits of the two positions.