It's only silly because you're being utterly obtuse. It wouldn't be silly at all if the "pro-life" side hadn't chosen a dumb as fuck term for themselves that doesn't really represent their stance well at all. One side is for letting women have the choice to give birth or not, whether or not they agree with that choice or would make if for themselves. They are pro-choice.

The other side is against letting women have this choice. They are anti-choice in this circumstance. You could also go with 'anti-abortion' (except then they'd try to paint the other side as 'pro-abortion', which is inaccurate, as many pro-choice people would rather abortions don't happen, but think women deserve the right to choose) or 'pro-forced pregnancy/birth' (anti-forced birth/pregnancy is an accurate summation of the other side).