Oligomenorrhea: Causes, Symptoms, Diagnosis & Treatment

What is Oligomenorrhea?

Oligomenorrhea is a menstrual cycle disorder characterized by irregular menstrual cycles lasting more than 35 days. Women with amenorrhea usually have fewer than nine periods per year.

It is important to note that this is different from amenorrhea, the complete absence of periods.

Oligomenorrhea is a common disorder in women of childbearing age. While occasional irregular periods are not usually a serious problem, persistently having fewer than nine periods per year may be a sign of an underlying medical condition.

What is the difference between oligomenorrhea and amenorrhea?

In rare cases, both menstruation and amenorrhea are menstrual irregularities but have different symptoms. Amenorrhea is a condition in which menstruation does not begin before age 15.

Meanwhile, secondary amenorrhea is a condition in which menstruation does not occur for three or more consecutive cycles in a woman who previously had regular menstruation.

Symptoms of oligomenorrhea

The main symptom of irregular periods is menstrual cycles that last longer than 35 days or occur fewer than nine times a year. Other, less common symptoms of menstruation include:

• Light and short periods
• Loss of libido
• Vaginal dryness

Early sign of oligomenorrhea

• Acne
• Hot flashes
• Hirsutism
• Weight gain
• Infertility

Causes for oligomenorrhea

Hormonal imbalance:

• PCOS
• Hyperthyroidism

Lifestyle factors:

• Exercise
• Weight loss
• Overweight
• Eating disorder
• Stress

Some medical and other condition:

• Diabetes
• Menopause
• Chronic condition
• Primary ovarian insufficiency
• Cushing syndrome
• Pelvic inflammatory disease
• Endometriosis
• Hyperprolactinemia
• Asherman’s syndrome
• Prolactinoma
• Pharma drug
• Pregnancy

How is oligomenorrhea diagnosed?

In rare cases, menstruation is characterized by irregular or irregular menstrual cycles, which requires a comprehensive diagnostic approach to determine the underlying cause.

Medical history

The diagnostic process begins with a detailed medical history. This includes questions about the patient’s menstrual cycle, age of onset, and recent changes in menstrual cycles. This may indicate symptoms of Lance’s confusion, polycystic ovary syndrome (PCOS), or menopausal disorders. Lifestyle habits such as physical activity, stress levels, and diet are also checked.

Test

A thorough physical examination is then performed, focusing on signs that indicate specific medical conditions.

BMI and weight: Check to see if you are underweight or obese, which may affect your menstrual cycle.

Skin and hair examination: Check for signs of androgen excess such as acne and hirsutism, which are often associated with PCOS (polycystic ovary syndrome).

Thyroid and breast examination: Check for goiter and galactorrhea (milk-like discharge).

During the examination, abnormalities such as swelling or tenderness of the reproductive organs are checked. These abnormalities may indicate conditions such as ovarian cysts and pelvic inflammatory disease.

Imaging

Imaging tests are performed if necessary to confirm the diagnosis.

Ultrasound examination: Transvaginal ultrasound or abdominal ultrasound is used to check for structural abnormalities of the ovaries and uterus (ovarian cysts, uterine fibroids, uterine malformations, etc.).

MRI or CT scan: In rare cases, advanced diagnostics can detect pituitary tumors and other hidden structural problems.

Clinical tests such as hormone levels (FSH, LH, prolactin, thyroid hormones), blood sugar levels, and insulin levels are often performed to complement the diagnostic process and identify underlying imbalances.

Treatment and Management

Treatment for rare menstrual irregularities depends on the underlying cause.

Pharmacologic therapy for associated symptoms

1. Hormonal therapy

Hormone therapy is often the first choice for regulating menstrual cycles and correcting hormonal imbalances.

Combined oral contraceptives pills (COCPs):

Regulation of the menstrual cycle

It reduces androgen levels and relieves symptoms such as acne and hirsutism.

Common prescriptions include ethinyl estradiol in combination with the following drugs:

Levonorgestrel, drospirenone: These drugs regulate the menstrual cycle by maintaining constant hormone levels and preventing hormonal imbalances common in conditions such as PCOS.

Cyproterone acetate (especially effective in PCOS with hirsutism): reduces excess androgens, improving symptoms such as acne and excessive hair growth (hirsutism).

Progestin-only therapy:

Medroxyprogesterone (oral or injectable), norethisterone: these progestins help induce withdrawal bleeding and establish regular menstrual cycles in women with short menstrual cycles, especially those who do not respond to estrogen therapy.

Hormonal intrauterine device (IUD):

IUDs that release levonorgestrel help regulate menstrual cycles and relieve menstrual cramps.

2. Insulin resistance agent

(Effective especially for the infrequent periods that accompany PCOS)

Metformin:

Improves insulin resistance.

Promotes ovulation and restores menstrual cycles.

May aid in weight loss and lower androgen levels.

Myoinositol and D-chyloinositol (dietary supplement):

A commercially available insulin resistance enhancer that helps maintain menstrual cycle regularity in PCOS.

3. Antiandrogen drugs

It is used to treat conditions such as hirsutism (excessive hair growth), acne, and male pattern baldness.

Spironolactone:

It inhibits androgen receptors and suppresses androgen production.

It is often used in combination with COCs (treatment of male pattern climacteric disorder) to prevent menstrual irregularities.

Finasteride:

A 5α-reductase inhibitor that inhibits the conversion of testosterone to DHT

Flutamide (rarely used due to risk of hepatotoxicity):

Non-steroidal antiandrogens

4. Painkillers

In rare cases of menstrual cramps associated with menstruation, painkillers may be needed.

NSAIDs (non-steroidal anti-inflammatory drugs):

Ibuprofen, naproxen, mefenamic acid: These drugs are not used to regulate the menstrual cycle but can help manage menstrual cramps (dysmenorrhea) caused by menstruation and irregular periods.

5. Treatment of thyroid or pituitary dysfunction

If the cause of irregular periods is an endocrine disorder, which is rare, specific treatments are used.

Levothyroxine: for hypothyroidism

Antithyroid drugs (e.g., carbimazole, methimazole): for hyperthyroidism

Cabergoline or bromocriptine: dopaminergic agents for hyperprolactinemia

 

Improve your lifestyle habits

Reducing stress and improving your diet are especially helpful for women with conditions such as polycystic ovary syndrome (PCOS).

Surgery

Surgery may be needed to remove the tumor that is producing excess androgens.

Other treatments

An intrauterine system (IUD) is effective for women with heavy or irregular periods and can shorten the length and severity of menstrual flow.