Is it ok to have not started?

you knoe your periodIs it ok to have not started?
If you′re 16 or older and haven′t gotten your period yet I would start worrying.
how old are you?
Have you had your period at all or never? Your age and development also have alot to do with this.
Some girls develop late so yes it is ok to not have started just yet.
How old are you?
If you are concerned make a doctors appointment.
if u are under 4% body fat this may occur. It happens in althetes