They didn’t come from Adam, unlike you and I, Adam was formed as a man but now we do have stages we pass through before we become adults and that’s the power of God, he knows best.

And using our immediate family for example, we can see that even amp some families there is still some lighter than some.

Adam was the one who was created first but when he gave birth to children those children gave birth to children and from there things kept changing.

I’m not sure why you are asking this but I’d say this is the much I can contribute to it and I hope it doesn’t make your faith waiver in any way.

This only shows how powerful and wonderful our God is, man can never fathom it all.