And the ones who don't know the biology are the ones most likely to believe the myths/get pregnant. Like my 17 year old room-mate when I had DD - she and her boyfriend (father of her baby) were totally clueless. At least family and friends and church were being supportive, but she was postponing higher education (CEGEP) for a year. I've always wondered how that all turned out.
I know maybe ten teens in our social circle who had a teenage pregnancy. Several in a single family. I'm sensitive to the drawbacks, the load it places on the people around them, and the lessons their child is learning from all this. Their have been successes within this group and some failures. In some cases I predict their children will repeat their parents' choices.
I really enjoyed my teens/twenties when I was single and childless. I have also enjoyed being a husband/father too.
During my "unattached" years I traveled the world, got my education and had adventures.
I think this is an important period/opportunity everyone ought to have. Tough for a 22 year old a young woman who has one or more children relying on her that may or may not have the support of those children's father(s).
Tough on the Dad too if he is properly invested in raising his children whatever his martial situation and supporting them even if he is not 'with' the mother.
I have a friend who struggles with her "ex" who either doesn't support the child or tries to take over the caregiver role even though he is in and out of legal trouble (drugs, jail, etc). WHY would a young woman ever get that close to a guy like that in the first place?
Life goes on...