One a day, plus iron

So I was reading a mefi article about precocious puberty. Author of the article was a dude who went through puberty at an appallingly young age. And that sucked. A lot. But, turns out it's not just dudes who go through puberty at an appallingly young age. It sometimes happens to girls, too.

Some of them become mothers. Wanna guess how old the youngest mother ever was?

( You probably picked too high. )