Understanding Irregular Periods: What's a Normal Cycle Length?

It is uncommon to have regular menstrual cycles every two weeks. Menstrual cycles are typically between 21 and 35 days from the start of one period to the start of the next. If you are having menstrual periods more frequently than every 21 days, we would recommend that you see your OBGYN to make sure that there are not any underlying medical conditions that need to be addressed. This could be completely normal, or you could have a medical condition that needs attention.