The boy is now a father, he never wanted this at nineteen and doesn't want it now.
That sucks, it really does. But...
He didn't have a choice
...he did. To not have sex or at least use condoms. But ultimately, he has sex, that’s the risk he takes.
Surely he should have some rights?
Well, yes. He has the right to not see the child and contribute nothing except $.
What he doesn’t have the right to do is
a) tell a woman, once he’s impregnated her, what to do with her body; or
b) deprive his child, once it’s born, of any financial support, keeping all his income for himself.
As an adult who had consensual sex...those are the rights he has.