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Irregular menstrual cycle (Oligomenorrhea)

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What is irregular menstrual cycle (Oligomenorrhea)?

Oligomenorrhea refers to an irregular menstrual cycle characterised by infrequent or unusually spaced menstrual periods. Instead of the typical 21 to 35 days between periods, individuals with oligomenorrhea may have periods that occur more than 35 days apart, or they may experience unpredictable menstrual cycles.

What are the symptoms of irregular menstrual cycle (Oligomenorrhea)?

Symptoms of oligomenorrhea can include:

  • Infrequent Menstruation: Menstrual periods occurring less frequently than every 35 days.

  • Unpredictable Cycles: Menstrual cycles that vary in length and are challenging to predict.

  • Light or Heavy Bleeding: Menstrual flow can be lighter or heavier than usual during irregular cycles.

  • Menstrual Pain: Some individuals with oligomenorrhea may experience cramps or pelvic pain during menstruation.

  • Hormonal Imbalances: Oligomenorrhea can be associated with hormonal imbalances, which may lead to other symptoms such as acne, hair growth, or weight changes.

What are the treatments available for irregular menstrual cycle (Oligomenorrhea)?

The treatment for oligomenorrhea depends on its underlying cause, which can vary from person to person. Here are some common approaches:

  • Lifestyle Modifications: Maintaining a healthy lifestyle, including regular exercise, a balanced diet, and stress management, can help regulate menstrual cycles.

  • Weight Management: Achieving and maintaining a healthy body weight can improve menstrual regularity, especially in cases where weight fluctuations are a contributing factor.

  • Hormonal Therapy: Hormonal birth control methods, such as birth control pills or hormonal intrauterine devices (IUDs), can help regulate menstrual cycles by providing a consistent hormonal pattern.

  • Medications: In some cases, medications like metformin or progestin therapy may be prescribed to regulate menstrual cycles, especially in cases of polycystic ovary syndrome (PCOS) or insulin resistance.

  • Management of Underlying Conditions: If oligomenorrhea is caused by underlying medical conditions like PCOS or thyroid disorders, treating these conditions can help restore regular menstrual cycles.

  • Fertility Treatments: In cases where irregular periods are linked to fertility issues, assisted reproductive technologies (ART) like in vitro fertilization (IVF) may be considered.


It's crucial to consult with a healthcare provider for a proper diagnosis and personalised treatment plan tailored to your specific needs and medical history. Addressing the underlying cause of oligomenorrhea can help improve menstrual regularity and overall reproductive health. If you are experiencing irregular menstruation, consult Dr Daniel Koh today!

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