Menstruation Length

How do I measure? Is this the last day of my last period of the first day of my neighbor? First day for the first day? First day on the last day? I need help!

Go to mymonthlycycles.com. He will give you a calculation of your cycle, if you just fill in the information. It even has a calendar to help keep track of your cycle and the period.

first in first or last to the end, anyway same answer I think ..........

Your menstrual cycle begins on the first day of your period begins and ends the day before the start of the next period. The average menstrual cycle lasts 28 days, if yours may be longer or shorter than that.