Skip to content
My WebMD Sign In, Sign Up

Women's Health

Font Size

Normal Menstrual Cycle - When to Call a Doctor

There is a broad range of "normal" among menstruating women. Unpredictable or long menstrual cycles are normal for teenagers and women in their 40s. For teens, a normal cycle can be as short as 21 days or as long as 45 days2. If you are a teen, you can expect cycles to even out over time. If you are nearing the age of menopause, you can expect menstrual cycles to become longer and eventually to stop. If you are not a teen and you are not older than 40 and your cycles are shorter than 21 days or longer than 35 days, there is a chance that you have a problem that needs to be checked by your doctor.

You will need a medical check by a doctor if you have any change in your menstrual pattern or amount of bleeding that affects your daily life. This includes menstrual bleeding, for three or more menstrual cycles, that:

Recommended Related to Women

Always Late? Find Out Why

By Keith Ablow, M.D.It’s high time to figure out what’s making you perpetually behind. Here, strategies to help you get out of the lateness rut. Some years ago when I was chief resident in psychiatry at the New England Medical Center, I decided it was finally time to enter therapy myself. I was dating the woman who would later become my wife and I wanted to explore why I hadn’t yet committed to her. So I booked an appointment with a noted psychiatrist, about 10 miles from my home, and left...

Read the Always Late? Find Out Why article > >

  • Lasts longer than 7 days.
  • Is a sudden or big change from your usual period.
  • Is very heavy. This means that you are passing large clots or soaking through your usual pads or tampons each hour for 2 or more hours.

Other symptoms you need to have checked include:

  • Bleeding between menstrual periods.
  • Pelvic pain that is not linked to menstrual bleeding and lasts longer than a day.

If you are a teenage girl, see your doctor if you have not started having periods by age 15.

For more information, see the topics Abnormal Vaginal Bleeding and Dysfunctional Uterine Bleeding.

1

WebMD Medical Reference from Healthwise

Last Updated: March 20, 2013
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
Next Article:

Today on WebMD

woman looking in mirror
Article
Woman resting on fitness ball
Evaluator
 
woman collapsed over laundry
Quiz
Public restroom door sign
Slideshow
 
Couple with troubles
Article
cat on couch
Evaluator
 
Young woman being vaccinated
Slideshow
woman holding hand to ear
Slideshow
 
Blood pressure check
Slideshow
mother and daughter talking
Evaluator
 
intimate couple
Article
puppy eating
Slideshow