Well you cant tell just by looking at her, but she may be moody from pms!
No, not unless the female says so. They aren't psychic.
you tell him/she your having a problem and he/she will ask what say im having my period.
Tell him you are having some girl problems and tell him it is the thing that comes monthly. I think he will get the hint. If he still doesn't understand, straight up tell him. Say "I got my period. Okay?" Then walk away.
Yes a girl of 10 years old have her period but it's some times weird for it to happen that young also you can tell if your having your period around that age soon because your Brest grow and they hurt
A girl won't get pregnant from not having her period; she may get pregnant from having sexual intercourse. However, the lack of the period may be an indication of pregnancy (but not the cause).
tell them easily with shock and painfullness and
if your a girl your probably having your first period. if your a guy.... get a girl its your puberty kicking in.
no
There will be blood coming out her vagina
Be supportive. : )
Yes
No.