I don't like it when people phrase it this way. Both parties get to make a decision.
The man choses when he either pulls out, wears a condom, or busts in her if he wants to have a baby...but for some reason a lot of men don't seem to understand that. Every time you bust in a woman, you're essentially checking the 'yes' box.
After that the woman gets to make her own decision...yes or no.
A lot of dudes have little discipline, make a bad choice themselves, then start harassing the woman to bail them out of the choice. If you didn't want a baby...you should have acted like you didn't want one.