Your best bet is to keep track of the days that you start and completely stop. If you want to find the average duration, keep track of the flow as well.
For tracking my period, i use Lady's calendar application.
Analyze, monitor, keep track of
Yes. The sugar pills do nothing but keep track of your days.
No, they are intended for you to keep track of the pills (active) that you have taken.
Keep track from where though?
He keep track of the stars' postitions.
Yes. Keep track of when your periods start and end on a calendar. When you have enough data you can predict when it will come.
pickles keep track
you can use it by saying " I keep track of my dailey schedule everyday."
Meteorologists keep track of tornadoes.
Track my shares?
You can't predict how long your first period will last because you need to keep track of how long your first few lasts in order to predict how long one will last. For most people it lasts about a week.