"My periods are irregular": understanding PCOS, the most common hormonal disorder (Hakdong Station OB/GYN)

When your menstrual cycle becomes irregular, the first thing that often comes to mind is anxiety, wondering, "Is something wrong with my body?" In the clinic, we often find that the most common background for such changes is a hormonal state where ovulation is not smooth, known as Polycystic Ovary Syndrome (PCOS).

What to Suspect if Your Periods Become Increasingly Irregular

Women visiting Blanc OB-GYN often say things like, "I only get my period every two or three months," or "It used to be regular, but lately it's suddenly become erratic."

When cycles lengthen or amenorrhea recurs, Polycystic Ovary Syndrome is a representative female hormonal disorder that we typically investigate. Rather than simply dismissing it as a matter of general condition, it can be helpful to check ovulation and hormonal patterns.

What is Polycystic Ovary Syndrome?

Polycystic Ovary Syndrome (PCOS) refers to a state where ovulation does not occur smoothly, leaving multiple immature follicles in the ovaries. The key is not just the appearance of many follicles on ultrasound, but the co-occurrence of ovulatory dysfunction and hormonal imbalance.

The following characteristics are typically observed:

• Irregular ovulation
• Lengthened menstrual cycles or amenorrhea
• Multiple follicles visible on ultrasound
• May be accompanied by androgen-related symptoms

The ability of ovulation to occur properly is a more important diagnostic criterion than the mere presence of many follicles.

If These Signs Are Also Present

PCOS often presents with a combination of several signs in addition to menstrual changes.

• Periods delayed by two or three months or more
• Irregular and erratic cycles
• Feeling that ovulation is not occurring properly
• Increased acne or sebum production
• Weight gain or difficulty losing weight
• Changes associated with insulin resistance
• Difficulties in the process of trying to conceive

In the clinic, it's not uncommon for those who come in saying, "My periods suddenly became irregular," to be diagnosed with Polycystic Ovary Syndrome. A menstrual disorder consultation can help examine the background of cycle changes.

How is the Diagnosis Made?

PCOS is not diagnosed based on a single symptom but by comprehensively evaluating several tests.

At Blanc OB-GYN, we select and perform necessary tests tailored to each individual's condition. If an overall health check-up is needed, a well-woman checkup can also be considered.

If menstrual changes are concerning but you're unsure where to start, you can consult us lightly now.

Why Does It Occur?

Polycystic Ovary Syndrome is reported to result from a complex interplay of multiple factors rather than a single cause.

• Increased insulin resistance
• Weight gain
• Relative increase in androgens
• Stress and lack of sleep
• Genetic factors

As the causes are diverse, management is not fixed to a single method, and an individualized approach is required based on the patient's condition.

What is the Approach to Management?

PCOS is not a disease that promises a cure, but rather aims to restore ovulatory function and maintain hormonal balance. It is important to jointly examine the structure and lifestyle environment that make recurrence easy.

• Menstrual cycle and ovulation regulation. If necessary, hormonal regulation is explored to stabilize the cycle.
• For those planning pregnancy. Treatment is focused on aiding ovulation, and plans can be made in conjunction with pre-pregnancy care.
• Lifestyle management. It is reported that even slight weight control can help restore ovulation.
• Management of skin and hair-related changes. Changes in symptoms related to androgens are also monitored.
• Metabolic health management. Improving insulin resistance can help improve overall symptoms.

Effects vary individually, and the appropriate direction is determined through consultation.

What Happens if Left Unmanaged?

Prolonged neglect of Polycystic Ovary Syndrome is known to affect overall female health.

• Persistent menstrual irregularities
• Ovulatory dysfunction and difficulties in conceiving
• Increased risk of endometrial-related issues
• Weight gain and increased metabolic risks

Conversely, starting management relatively early can lead to cycle recovery and overall health improvement. While there are individual differences, it is helpful not to delay checking.

Don't Delay, Get Checked

Polycystic Ovary Syndrome is common among women but requires consistent management. If your periods have become irregular or you're experiencing acne and weight changes, we recommend checking your condition through a general consultation.

Finding the right approach for you can lead to improvements not only in your menstrual cycle but also in your overall condition and skin. If you'd rather not worry alone and want to ask comfortably, start below.

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Dr. Eun-Jin Lee, Chief Physician (OB-GYN specialist at Samsung Medical Center, Member of the Korean Society of Obstetrics and Gynecology, Member of the Korean Society of Menopause) Dr. Eun-Jin Lee's Profile First published 2025-11-15 / Last reviewed 2026-06-17

This article provides general medical information, and individual differences may exist in symptoms and recovery. Accurate diagnosis and treatment require consultation with an OB-GYN specialist.