Trapped pregnancy

One thing I don't quite understand is why would anyone in there right mind would go as far as trapping a guy by getting pregnant. Now I know that there are many girls out there that feel co-dependent of there man or feel that maybe having a kid would repair the damage to there relationship or even have them stay but in nearly every situation that isn't even the case. I'm not coming out of no where with this I know a girl who has recently made 10 months with the guy she's with and she got pregnant when they were at 9 months now to her it was a relationship but clearly to him he didn't see it that way and she felt if she had a baby he would stay, because his plans were to leave her, he couldn't even stand her. But he stayed because he realized he had to own up to what he had done, and now she's complains how he's just a jerk and he plays her. he does what he please and he treats her like shit so where does that leave her alone and pregnant not to mention miserable. So tell me is it worth giving up your life to a man that's not even worth it. Come on girls where's your self respect, your dignity, trapping a guy into pregnancy isn't the right thing to do if he doesn't want you let him go, know when you do stupid things like this it not only hurts you but the baby you carry. these girls need to wisen up because a man isn't everything and if a man is determined to leave he'll leave so be smart and think.