Abortion.

"It's not a baby, it's a fetus."

This argument is far from being false. "Baby" isn't a biological term and what we see as a baby is up to us. 

Some mothers call their children "baby" for their entire lives. Some individuals give this title to their pets, some to their lovers, ect.

So to you, a fetus may not be a baby. And to a lot of pro-lifers isn't not, either.