These day at what age periods are starting in girls?

A. I heard a child getting period at the age of 7 1/2 years to 8 years of age which is absolutely not right and is very scary so you have to make sure that you’re giving proper diet there is a good physical workout for your child and if you see symptoms like breast development pubic area hair and under arm hair together that means a period within six months you need to be very particular the right is to have period over the age of 11 to 12