Your body decides when you start your period nothing else. Hormones determine when this will happen.
you cannot control when your period comes, so there aren't any early methods.... your period is control-ed by the medulla which is the part of the brain that controls the uncontrollable- breathing ect.
You can start conceiving from your first period.
Your period will start within 7 days
You can start them whenever, but it is a possibility that your period will be delayed.
you start your period when you are 8-16 year old... BE PREPARED!!
It is perfectly normal to start your period weeks early and its dark brown. You mostly start with dark brown when you start your period and it turns red.
Your cycle is from the start of your period to the start of your period. (have alook it the lik below)
A sugar pill is what women take to start their period. It allows the period to start.
If you have never had your period before, than your period will start when your body is ready. That is proberly why some of yoour school mates (assumed) start at different times.
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You can start your birth control the Sunday after your period.
You start counting on the first day of your period.