Usually a girl has around 13 periods a year.
probably
12 year old girls can if they have started their periods and had sexual intercourse
A bigger stomach and no periods :/
Young girls may not have regular periods for their first year or two, or their periods may be very light, a condition known as oligomenorrhea.
Girls have had periods since well, ever! A period is when blood is realised out of a girls vagina. That's it basically
12
Periods have nothing to do with sexual orientation. Lesbians are just as capable of menstruating as straight girls.
Yes all girls start there periods between the ages of 9-16
if they have started their periods then yes, but I'm a bloke so I'm not really an expert
they are like 68677567584 girls and boys
some changes are pimples,and for girls periods and for boys a liquid that is heaver than water containing sperm which if girls have they're period can get girls pregnant.
Your body might not be able to produces the hormones necessary for menstruation. Many women in Africa or anorexic girls do not have their periods as often as they should. This is due to a lack of health. Their bodies don't produces the hormones so they don't have periods as often.