If your mother is 1.64cm and your dad is 1.7cm, then for sure you're going to be extremely short. I've seen some insects taller then that. 1.6cm is less then 3/4"

And what Aux said, your first menstrual cycle has more to do with environment and genetics, and nothing to do with you height.

I have a friend that when it came close to his graduation from medical school, they actually told him to deliberately make his handwriting, and especially his signature, sloppy. Sloppy is harder to forge.