Oligomenorrhea: Infrequent periods/Long cycles

Fact checked

By SheCares Editorial Team | Updated: Sep 15, 2022

Because menstrual patterns vary among women, many of them do not even realize that what they accept as their norm is actually considered irregular periods. Such is the case with oligomenorrhea, or infrequent periods, which is said to affect up to 15% of women of childbearing age.1 As such, self-education is key to seeking appropriate treatment and achieving optimal menstrual health for years to come.

Read on to learn more about oligomenorrhea, including the proper oligomenorrhea definition, its symptoms, what causes long menstrual cycles, what risks and effects they can have on your health, and how to treat them once and for all.


What is Oligomenorrhea?

What is oligomenorrhea

Oligomenorrhea is a medical term for infrequent periods. It is one of the most common menstrual disorders.

It could also be described as having long cycles, namely those that last longer than 35 days. With such long cycles, a woman's periods are less frequent, resulting in less than six to eight per year.2

For reference, a healthy menstrual cycle is defined as one that lasts between 21 and 35 days, with bleeding lasting for 3-7 days.3

While occasional period irregularities are common throughout a woman's reproductive years, those that persist for longer than three months generally call for an evaluation.

Oligomenorrhea Symptoms

Oligomenorrhea symptoms

Similarly to amenorrhea, or lack of periods, oligomenorrhea does not produce symptoms on its own. The only characteristic is long cycles that last over 35 days

However, because infrequent cycles are indicative of other underlying conditions, they might be accompanied by other symptoms characteristic of them. They can include the following:

What Causes Long Menstrual Cycles?

What causes long menstrual cycles

Infrequent periods is most commonly caused directly or indirectly by hormonal imbalance, which can be brought about by unhealthy lifestyle practices or medical conditions.

The most common long menstrual cycle causes are as follows:

  • Birth control medications
  • Polycystic ovary syndrome (PCOS)
  • Perimenopause
  • Strenuous exercise
  • Insufficient body fat percentage
  • Eating disorders, such as anorexia or bulimia nervosa
  • Thyroid disorders, most commonly hyperthyroidism
  • Hyperprolactinaemia, or high prolactin levels in the blood
  • Medications side effects, like those for epilepsy or anxiety disorder
  • Prolonged stress
  • Diabetes mellitus
  • Pituitary tumors

Oligomenorrhea Risks & Effects

Having infrequent periods long-term may expose a woman to potentially negative health risks, such as:

Fertility Problems

For a healthy couple of reproductive age, it might take up to a year to successfully get pregnant.4 Those trying to get pregnant with infrequent periods have lower chances of conceiving and might take longer to have a baby as there are less cycles in a given year.

Moreover, oligomenorrhea is likely to be accompanied by ovulation problems, including irregular or infrequent ovulation (oligoovulation) or even lack thereof (anovulation). Abnormal ovulation is one of the most common causes of infertility.

Endometrial Abnormalities

Studies have also found that infrequent periods in women with PCOS puts them at an elevated risk of endometrial hyperplasia (EP), an increased growth of the lining of the uterus called the endometrium.5 Having EP is a known factor for developing endometrial cancer.6

Diabetes Mellitus Type 2

Although further research is necessary for a better understanding of the connection, a study has found that long cycles are a potential risk factor for the development of diabetes type 2. Obese women (body mass index, BMI, above 25 kg/m2) are at a higher risk.7

Oligomenorrhea Treatment

Oligomenorrhea treatment

The ultimate goal of oligomenorrhea treatment is to resolve the underlying cause. As such, the approaches will differ from woman to woman depending on her medical needs.

Generally, it is always beneficial to begin with the most natural approaches to treating oligomenorrhea and proceeding to pharmacological treatments if necessary. These can include the following:

  • Lifestyle adjustments. These approaches for treating long cycles can consist of improving one's diet to resolve nutritional deficiencies; modifying exercise routine to focus on moderate-intensity workouts of 150 minutes weekly; and practicing stress-relief techniques of yoga or deep breathing.

  • Alternative medicine. Herbal supplements that can help promote hormonal balance include phytoestrogenic supplements, like chasteberry, that provide the body with plant-based estrogens or hormone-regulating supplements, like Macafem, that optimize endocrine system function for overall balance.

  • Conventional medicine. Medications might be necessary to control medical conditions behind infrequent periods, including thyroid medications, birth control pills, or dopamine agonists, among others. It can also consist of psychotherapy for women with eating disorders.

Women whose infrequent periods are related to perimenopause might not require treatment as it is a natural phase in life as their ovaries near the end of their reproductive functions.

It is also worth noting that for optimal menstrual health, women are encouraged to keep track of their monthly patterns with period trackers.

Key Takeaways

A woman's menstrual patterns are a reflection of her overall health. So, when faced with irregularities, such as infrequent periods or long cycles, it calls for prompt evaluation to restore hormonal balance and achieve healthy menstruation. Oligomenorrhea, defined as cycles longer than 35 days, can be caused by a number of medical conditions and lifestyle habits, including PCOS, excessive exercise, eating disorders, or thyroid conditions. Since a great majority of those causes have hormonal roots, optimal treatment will be tailored to that specific cause and aimed at restoring equilibrium. Natural approaches to relieving long cycles can consists of implementing wholesome practices of balanced diet, exercise, and stress-relief techniques alongside alternative medicine, while conventional treatment can include medications as well as psychotherapy.