No. Periods start when girls hit puberty, around 12-15, and end during menopause, around 50.
Yes, they can.
Yes they do, they're still girls.
It depends on the person. Girls who are exceptionally physically active, such as gymnasts, often skip periods because they push their body to its limits and their weight drops to an unhealthy point.
when is the right time to put copper t as a contraceptive, is it during monthly periods
No. All girls have their periods, and it just means you can have babies when you grow up. :)
Girls have had periods since well, ever! A period is when blood is realised out of a girls vagina. That's it basically
no, this you be checked by a doctor
Periods have nothing to do with sexual orientation. Lesbians are just as capable of menstruating as straight girls.