What is a Normal Menstrual Cycle?

Menstrual cycle

The normal menstrual is periodicity with a cycle of once a month. A menstrual cycle is from Day 1 of bleeding to Day 1 of the next time of bleeding. Generally, the average cycle is 28 days, it is also normal to have a cycle that is as long as 21 days or as short as 35 days. For menarche of a teen, a normal cycle can last up to 45 days.

menstrual period

Duration of each menstrual is the monthly menstrual bleeding (also called menstrual period). The menstrual period usually last 2 to 8 days, average 3 to 5 days. The total amount of menstrual blood is 30 to 50mL.


  • It’s especially important to check that if you have three or more cycles that last longer than 7 days or are very heavy and if you have bleeding between your periods or pelvic pain that is not from your period.

  • If your periods are very regular then it is fairly easy to work out when you are likely to be ovulating. If your periods are not regular then it is not so easy. If your periods are very irregular you may not be ovulating at all or infrequently. Again keep dates and if you are trying for a baby and have no success after six months, see your doctor.