Skip to content
My WebMD Sign In, Sign Up

Teen Health

Font Size

Menstruation: Not Having a Period by Age 15 - Topic Overview

The menstrual cycle is the series of changes a woman's body goes through to prepare for a possible pregnancy. Most girls start having periods between the ages of 11 and 15.

A girl who has not had her first period by age 15 has what is called primary amenorrhea. This is different from infrequent or light menstrual cycles, which are very common in teen girls, particularly in the first couple of years after menstruation begins. Primary amenorrhea is also different than if a girl starts having periods, but then stops having periods for at least 3 cycles.

Recommended Related to Teens

How Tall Will I Be?

What can you expect when it comes to your final height? It’s almost as easy as taking a look at your parents, but there’s more to it than that. WebMD asked pediatricians to answer the most common questions about getting taller. They’ve also sorted out the truth from myths when trying to determine your adult height and if there’s anything you can do about it.

Read the How Tall Will I Be? article > >

Causes of primary amenorrhea include:

If no problem can be found to explain why you are not having periods, your doctor may prescribe birth control pills to help control your cycle. These will also help keep your bones strong, reducing your risk for brittle bones (osteoporosis). Your doctor also may prescribe calcium supplements to help ensure that your bones stay healthy.

Girls who have not begun to develop breasts or pubic hair by age 14 may have an increased chance of having amenorrhea.

You can still become pregnant even though you are not menstruating. Practice birth control if you do not wish to become pregnant.

1

WebMD Medical Reference from Healthwise

Last Updated: June 20, 2011
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:

Menstruation: Not Having a Period by Age 15 Topics

Today on WebMD

unhappy teen couple
Article
mini cupcakes
fitSlideshow
 
teen couple
ARTICLE
Teenage Couple standing in a fairground laughing
Article
 
Sugary drinks
fitSlideshow
teen wearing toning shoes
fitSlideshow
 
young woman texting
Article
teen boy holding a condom
ARTICLE
 
Teen girls eating ice cream
fitQUIZ
teen sleeping
fitARTICLE
 
couple kissing
SLIDESHOW
Taylor Swift
fitSLIDESHOW