What if it's not the woman's choice? What if she's coerced or tricked into having children that she doesn't want and then the guy leaves, either during the pregnancy or afterward? What if she's unsure but the guy changes her mind because ~he loves her so~ and ~they'll make a great family~ and then ditches her and the kid(s)? What if she gets pregnant from being raped? What if the guy tells her "don't worry, you can't get pregnant from doing this" and she believes him because she's young and/or hasn't had proper sex education?

Reading your comments here, it doesn't seem like any of these possibilities have even occurred to you. It's not always their choice, and even when it is it's often his choice as well. Lots of couples plan a family together that later break up. Are you saying that she should be the only one at fault there? Really?

You mentioned elsewhere in the thread that you like shades of grey, but you seem to be viewing this very much in black and white terms.