The menstrual cycle begins with day 1 which is the first day of bleeding. The last day of the cycle is the day before the next period begins.
Chat with our AI personalities
The typical menstrual cycle is around 28 days in length.But everyone is different and menstrual cycles can vary by a few days from cycle to cycle.
The first day of a womans menstrual cycle is also the first day of menstruation.
There are plenty of places online to find a menstrual cycle calculator. Tampax has a very nice menstrual cycle calculator. It is simple and easy to use.
A girl can start her menstrual cycle from when she is about 9 years old any where through to when she is 16 years old.
The average menstrual cycle is 28 days - that's from day one of your period up until your next period, but everyone's menstrual cycle is different. It can vary greatly depending on the person and some people have up to 35. It's best to work out your average menstrual cycles yourself by adding together your last six cycles then dividing by six - as long as your periods fall within a week of your average menstrual cycle length it is considered regular. The first year you start menstruating your cycles will be very inconsistent and might not come for up to 6 months after your first cycle. this is very common and you should not be worried. also if you have it sooner than 6 months than that is also normal.