[ape descendant]

Actually, about the turn of the last century the acceptable marriage age for women was 18-21. Pre-marital pregnancy was highly frowned upon.

Teenage girls are generally neither fully grown physically or fully developed mentally. Babies of teenage mothers tend to have low birth weight and both mother and child are more likely to experience complications during the pregnancy.

I don't think I even want to start on the educational and economic reasons against being a teenage mommy.