only in America....
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Giving it a bit more thought, I think these are a whole lot of unmarried mothers waiting to happen. They are far too young to understand the bigger picture of what they are agreeing to.
In time, many of these girls are likely to get boyfriends and start thinking about sex. Instead of having parents who will guide their daughters through this minefield of safe choices, contraception, consent and relationship negotiation - these girls have parents who will offer no support at all if she chooses a direction which they don't agree with. To the point where she will probably feel that she can't even go to them for support.
My own approach couldn't be more different. My 14yo daughter now has her first boyfriend. All they do at this stage is kiss, but our conversations are open and honest. I help guide and support without judgement and in turn, she offers up a surprising amount of information. I'm the type of parent who is likely to allow sleepovers with a long term boyfriend (not casual sex) when she's older than 16* because I'd rather she be doing it in the safety of home than out in a car in the dark somewhere.
*16 is age of consent here.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.