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Menstruation: Not Having a Period by Age 15

Table of Contents


Overview

The menstrual cycle is the series of changes in the body to prepare for a possible pregnancy. Menstruation most often begins between the ages of 11 and 15.

If you haven't had a first period by age 15, it's called primary amenorrhea. This is different from infrequent or light menstrual cycles, which are very common in teens, particularly in the first couple of years after menstruation begins. Primary amenorrhea is also different than if you start having periods, but then stop having periods for at least 3 cycles.

You can still become pregnant even though you aren't menstruating. Practice birth control if you don't want to become pregnant.

What causes it?

Causes of primary amenorrhea include:

How is it treated?

Treatment depends on the cause. If the cause is a physical problem, such as imperforate hymen, then you may have surgery. For other causes, your doctor may prescribe hormone therapy to help control your cycle. It can also help protect your bones. Your doctor also may prescribe calcium supplements for bone health.


Credits for Menstruation: Not Having a Period by Age 15

Current as of: November 27, 2023

Author: Healthwise Staff (https://www.healthwise.org/specialpages/legal/abouthw/en)
Clinical Review Board (https://www.healthwise.org/specialpages/legal/abouthw/en)
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