HomeAnswersObstetrics and Gynecologypolycystic ovary syndrome (PCOS)

What would be the reason for irregular periods in a girl?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I am a healthy 19-year-old. I have been having issues with on-and-off periods for nearly four years now. When my periods started, they were normal, neither heavy nor light, and nothing unusual. But I started missing my cycle for about six months, and then it would come back completely normal. My last episode of missing my periods lasted for nearly ten months, and I have had no unusual symptoms, discharge, or pain.

I have been to my doctors twice, and I have had an ultrasound, which came back completely normal, blood tests, and hormone tests, which also did not pick up anything unusual. I want to get to the bottom of this problem. Is there anything else you think I could do? What do you reckon about this? I am not stressed, obese, or underweight. I do not smoke or drink.

Kindly advise.

Answered by Dr. Sonal Prasad

Education:

MBBS

Professional Bio:

Dr. Sonal Prasad is a well-experienced Obstetrics and Gynecologist with 14 years of clinical experience. She completed her MBBS from The West Bengal University of Health Sciences in 2010. She then did her DNB from the National Board of Examinations in 2015. She is also a Childbirth Educator and Lactation Counselor. She is currently working at NuLyf Clinic, in Delhi.

This doctor is not available for online consultations on the platform anymore.

Hello,

Welcome to icliniq.com.

The menstrual pattern you quote sounds like PCOS/PMOS (polycystic ovarian syndrome/polyendocrine metabolic ovarian syndrome). It is a hormonal imbalance characterized by menstrual abnormalities. I suggest doing the following tests on day two of periods to diagnose and classify the type of PCOS/PMOS. The timing is crucial.

  • LH - Luteinizing hormone.
  • FSH - Follicle-stimulating hormone.
  • E2 - Estradiol.
  • FBS - Fasting blood sugar.
  • Fasting insulin.
  • DHEAS - Dehydroepiandrosterone.
  • Free testosterone.
  • Gynecologic ultrasound.

Once you have all these tests done on day two of your period, I request you upload the reports, as it is the ratio of hormonal levels rather than their absolute values that is deranged in PCOS/PMOS. As you say certain hormonal tests were done and came out normal, I presume that your thyroid and prolactin levels were normal. Get them done, too, if the report is more than three months old.

  • Would you please tell me if you have already missed a period by a month in this cycle so that I can suggest medication to induce periods?
  • Would you please give the exact dates of the periods in that case? If you have not missed your period yet, then wait for your period and get the test repeated on day two.

Kindly help me with these question to assist you further.

I hope this helps you.

Thank you.

Medically reviewed by iCliniq medical review team
Published At October 15, 2016
Reviewed At May 29, 2026

Education:

MBBS

Professional Bio:

Dr. Sonal Prasad is a well-experienced Obstetrics and Gynecologist with 14 years of clinical experience. She completed her MBBS from The West Bengal University of Health Sciences in 2010. She then did her DNB from the National Board of Examinations in 2015. She is also a Childbirth Educator and Lactation Counselor. She is currently working at NuLyf Clinic, in Delhi.

This doctor is not available for online consultations on the platform anymore.

Same symptoms don't mean you have the same problem. Consult a doctor now!

2,876Checks completed today
4.7/5User rating
~2 minAverage completion time
Evidence-basedGuideline aligned
Symptom Awareness Builder
Irregular Periods Awareness Builder

Concerned about irregular periods?

Five quick questions help you understand common reasons for irregular periods, what might be typical, what to mention to your doctor, and when to seek prompt medical advice.

Private and judgment-free. For guidance only, not a diagnosis.

Education:

MBBS

Professional Bio:

Dr. Sonal Prasad is a well-experienced Obstetrics and Gynecologist with 14 years of clinical experience. She completed her MBBS from The West Bengal University of Health Sciences in 2010. She then did her DNB from the National Board of Examinations in 2015. She is also a Childbirth Educator and Lactation Counselor. She is currently working at NuLyf Clinic, in Delhi.

This doctor is not available for online consultations on the platform anymore.

Listen to related tracks in our music library
Comprehensive Second Opinion

Ask your health query to a doctor online

*guaranteed answer within 4 hours

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.