Please don't use the word "kids" unless you're prepared to provide a reasonable definition of the term.
Young adults are perfectly capable of learning about how the world works. Being barred from entering that world they are prevented from learning, their growth is retarded, and the resulting immaturity is then used as an excuse to infantilize them even more. It's a vicious cycle of dumb attitudes causing tremendous harm which our society reacts to by doubling down on the dysfunctional ideas that started the whole problem.
"childhood pregnancy" is an oxymoron :-)
Evolution is what created our natural state. We are much less likely to be traumatized by things which are natural for our species than by very unnatural behavior.
The simple fact is that women are choosing to have children at higher and higher ages. The average age is about 24 in my country right now.
Provide education and contraception and unplanned pregnancy among teens is easily solved. There is no need to lie to ourselves and shout obvious absurdities like "Babies Having Babies!!!!! Trauma!!!!"