It is normal in the case that your Pituitary gland timing hasn't started releasing the hormones that induce puberty, and thus a period. Though if you get extremely worried perhaps you should see a doctor for a check-up. Just to reassure you everything is alright. http://kidshealth.org/kid/grow/body_stuff/puberty.html
It is normal, my daughter also started her period and I was worried that something was wrong. Everyone is different, and I can assure you that it is completely normal. :) x
Sometimes your period can be a little late. If you've started playing sports, it's normal if you miss a period or two. I've gone through it myself.
It pretty much started before we even became a country and in some places it hasnt even ended
Yes its fine, periods start anywhere between ages 9-17. Trust me, I'm also 11 and have my period. It's absolutely normal.
yes
about 7 years
Yes it is normal, some people develope slower than others. Dont worry until your 16 then you might want to talk to your docter about it.
It is not normal to get your period that early. If a 5 year old did start her period then it would be recommended that she see a doctor.
Sorry but this question isn't very clear. . . If your period was due on the 1st then that is normal yes. If you are bleeding again on the 12th and you had your period on the 1st then this is normal if you have just started your periods within the last year. If you are on birth control, have irregular periods, are stress or worried about something then this will cause two periods in one month but see your doctor for a check up.
I don't believe she needs to go to a doctor, its a normal thing for a girl to have her period. Unless there is problems, then yes I suggest going.
Yes
yes if they have started ther period or started their menstrual cycle