how old does a girl have to be to start her menstrual cycle
As with everything about the body everyone is different there is no "normal" age typical is a better word and that can be from as young as 8 to as old as 19-20
It differs from girl to girl. Normal age is about age 9 - 11 but it comes at any age, my mum got hers at 17.
the average age for most people is 12 13 14, I'm 13 and I started mine in january
normally from 9 to about 12 , but I know people starting them at 16.