What is the length of a menstrual cycle?

Menstrual cycle is counted from the first day of period to the first day of the next period. For most women the menstrual cycle is between 21 to 35 days.

References:

1. Menstrual cycle: What's normal, what's not, http://www.mayoclinic.com

Next Article:  

Related Articles:

Click here to see Menstrupedia's Full QuickGuide for Girls 

Content Used With Permission