What's the main reason for a girl to stop growing at such an early age?

Anonymous
Ok, so I stopped growing at age 16 but I had reached 5'7. I guess that's not so bad and it seems the right age.

However, I have a bunch of female friends that stopped growing at ages 11-13 and all of them are shorter, the shortest one being 4'11. Two of them actually come from tall parents and grandparents.

in my opinion, an 11-13 year-old girl is still a child. Plus, if I were going to Netherlands, even the women are more taller and don't stop growing at such a young age.
Updates
+1 y
I often read that a girl generally stops growing between ages 16-18 but I've been seeing that many girls in my school stopped much earlier than that.
What's the main reason for a girl to stop growing at such an early age?
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