How long is a menstrual cycle

Most women believe the average menstrual cycle is 28 days long, but cycles can range from 23 to 35 days. Read on to learn more about periods and fertility.
Do you know how long a menstrual cycle is? You may answer with the textbook 28 days, but a study of more than 30,000 women found that 87% had cycles that fell in the range of 23 to 35 days1.

Menstrual Cycle - Women's Health Issues - Merck Manuals Consumer Version

The Heat Cycle in Cats Explained

Anovulatory Cycle: What Is It, Causes, Treatment, and More

Long Menstrual Cycles? What You Should Know

Menstrual cycles today: how menstrual cycles vary by age, weight

4 Ways to Calculate Your Cycle Length - wikiHow

Menstrual Cycle: Phases & Hormones

The Menstrual Cycle and Sport - HPSNZ

Menstrual cycles today: how menstrual cycles vary by age, weight, race, and ethnicity – Apple Women's Health Study

What's a normal menstrual cycle? - FUTURE WOMAN