Oligomenorrhoea

Overview

Oligomenorrhoea is a condition in which a woman has infrequent menstrual periods. Normally, a period comes every 24 to 38 days. With oligomenorrhoea, cycles are longer than 35 days, so you might have fewer than 9 periods per year.

Yes, oligomenorrhoea is fairly common. About 1 in 5 women may experience it at some point in their lives.

It can affect women of any reproductive age, but it is most common in teenagers (during the first few years after starting periods) and in women in their 40s (as they approach menopause).

Symptoms

Common symptoms

• Menstrual cycles longer than 35 days
• Fewer than 9 periods per year
• Irregular or unpredictable periods

Symptoms in children

• Irregular cycles after the first period (normal for first 2-3 years)
• Cycles that are still infrequent after 3 years of menstruation

Symptoms in older adults

• Spotting between periods
• Heavy or light bleeding when periods come
• Cycles becoming more spaced out as menopause approaches

Causes

Main causes

• Polycystic ovary syndrome (PCOS) – a common hormone problem
• Thyroid disorders (underactive or overactive thyroid)
• High levels of the hormone prolactin (hyperprolactinaemia)
• Extreme weight loss, rapid weight gain, or eating disorders
• High levels of stress
• Excessive exercise (especially endurance sports)
• Starting or stopping certain hormonal contraceptives

Risk factors

• Being a teenager (first few years after starting periods)
• Approaching menopause (perimenopause)
• Having PCOS or a family history of it
• Being very underweight or overweight
• Having a chronic illness like diabetes or thyroid disease

When to see a doctor

See a doctor urgently if:

• If you have severe pelvic pain or very heavy bleeding
• If you think you might be pregnant and have abnormal bleeding or pain

Book a routine appointment if:

• If your cycles are consistently longer than 35 days for more than 3 months
• If you have fewer than 9 periods in a year
• If you want to become pregnant and have irregular periods
• If you have other symptoms like weight changes, acne, or excess hair growth

Diagnosis

Your doctor will ask about your medical history, your periods, and any other symptoms. They may also do a physical exam and order some tests.

Tests that may be done

• Blood tests to check hormone levels (thyroid, prolactin, and androgens)
• Pelvic ultrasound to look at your ovaries and uterus
• Sometimes a glucose tolerance test to check for insulin resistance

What to expect at your appointment

The doctor will help identify the underlying cause. You may be asked to track your periods on a calendar for a few months. Most tests are simple and painless. If an imbalance is found, treatment can usually help regulate your cycles.

Treatment

Treatment for oligomenorrhoea depends on what is causing it. The goal is to address the underlying condition and help you have regular periods if needed. Many cases can be managed with lifestyle changes or medication.

Self-care at home

• Keep a record of your periods to spot patterns
• Manage stress through relaxation or counselling
• Maintain a healthy weight – both underweight and overweight can affect cycles
• Limit intense exercise and get enough rest

Medical treatments

Your doctor may suggest hormonal treatments such as contraceptive pills or patches to regulate your cycle. If an underlying condition like PCOS or thyroid disease is found, specific medications (not named here) may be prescribed. Always consult a doctor before starting any treatment.

When is surgery considered?

Surgery is rarely needed for oligomenorrhoea alone. It may be considered if there is a problem like a pituitary tumour (adenoma) or uterine condition that requires removal.

Living with this condition

Living with infrequent periods can be manageable. Keep track of your cycles so you know when to expect your next period. If you are trying to conceive, monitoring ovulation can be helpful but is not always accurate with irregular periods.

Lifestyle tips

• Eat a balanced diet rich in whole grains, fruits, and vegetables
• Stay physically active but avoid overtraining
• Get enough sleep (7-9 hours per night)
• Practice relaxation techniques like yoga or deep breathing

Diet and exercise

A healthy diet and regular moderate exercise can help balance hormones. Aim for at least 150 minutes of moderate activity each week, such as brisk walking or cycling. Avoid crash diets or extreme workouts.

Mental health and emotional wellbeing

Irregular periods can cause worry, especially if you are trying to get pregnant or if you are concerned about your health. It is normal to feel anxious or frustrated. Talking to a healthcare provider can ease concerns and help you feel in control.

Prevention

Not all cases can be prevented, but you can reduce your risk by maintaining a healthy weight, managing stress, and avoiding extreme exercise or dieting. Treating underlying conditions like thyroid disease early may also help.

Screening programmes

Routine health checks, including blood tests for hormone levels, can help detect problems early. If you have irregular periods, see your doctor for an assessment.

Complications

If left untreated

• Difficulty getting pregnant (infertility) due to irregular ovulation
• Thickening of the uterine lining (endometrial hyperplasia), which may increase the risk of uterine cancer if left for a long time
• Long-term effects of the underlying cause, such as insulin resistance or bone density loss

Long-term outlook

With proper diagnosis and treatment, most women with oligomenorrhoea can have regular periods and a good quality of life. Many cases resolve on their own or with simple lifestyle changes. If you are concerned, talking to a doctor is a positive step.

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