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Symptom Checker

Step 4: Read and complete the decision guide to learn more about your symptoms.

Missed or Irregular Menstrual Periods

Most teenagers have started their periods by age 16 years, although it's possible to start a little later and still be normal. If you have reached your 18th birthday, then you have a condition called primary amenorrhea.

Are you 16 or 17 years old?

Yes, this is my age.

No, I am past my 18th birthday.

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