Your period or 'menstrual period' starts when vaginal bleeding is observed, on average every 28 days and lasting on average 3-5 days. Spotting does not count as a menstrual period. Your period bleeding begins when you see real blood, not just spotting.
So, is it 28 days from the day your period starts or ends?
day 1 is the first day your period begins and then the days up to your next period is known as your cycle length. Ex. Feb 23 is day 1 then you start again March 26 your cycle length is 28 days.
What is considered to be the first day of your period?
A: The first day of your menstrual cycle is considered to be the first day of heavy menstrual flow. Even if you have days of spotting before your heavy flow, we consider the 1st day of your cycle to be the 1st day of your heavy flow.
What is my average menstrual cycle length?
A menstrual cycle is the time between the first day of your menstrual period (the first day you bleed) and the first day of the next menstrual period. The average menstrual cycle is 28 days long, although normal menstrual cycles can range anywhere from 21 to 35 days in adults, and from 21 to 45 days in young teens.