Well, Beverly, mom is a vodka chugging, chain-smoking woman who knows she won't get sober. Wait, she's a meth addict.  No, a crack smoking prostitute. Oh, wait, she's a heavy drinker with an abusive boyfriend - he beats her a lot but promises to change. She has three little kids already. 
The reasons that women have abortions are many. It's a personal choice, not one for anyone else to decide.
Many women do give up their children for adoption. I doubt that all of them live without regret.