What Are Endometriosis and Polycystic Ovarian Syndrome?
Endometriosis
Endometriosis occurs when tissue similar to the lining of the uterus grows outside the uterus, such as on the ovaries, fallopian tubes, or other areas within the pelvis. This tissue responds to hormonal changes during the menstrual cycle, which may lead to inflammation, irritation and scar tissue over time.
Women with endometriosis may experience symptoms such as painful periods, chronic pelvic pain, heavy menstrual bleeding or discomfort during intercourse. However, symptoms can vary widely and some women may have minimal symptoms while others experience more significant discomfort.
Polycystic Ovary Syndrome (PCOS)
PCOS is a hormonal condition that affects how the ovaries function. Women with PCOS may experience hormonal imbalances that can disrupt regular ovulation.
Common signs of PCOS include irregular or missed periods, acne, excess facial or body hair and difficulty conceiving. Some women may also develop multiple small follicles in the ovaries, which can be seen during an ultrasound examination.
What Symptoms Do Endometriosis and PCOS Have in Common?
Although endometriosis and PCOS are different conditions, they can share some similar symptoms. Because of these overlaps, it may sometimes be difficult to distinguish between the two without a proper medical evaluation.
- Changes in menstrual patterns: Irregular cycles, heavy menstrual bleeding or other disruptions to the usual period pattern may occur in both conditions.
- Difficulty conceiving: Both can affect fertility, though in different ways. Endometriosis may impact the pelvic organs, while PCOS can interfere with regular ovulation.
- Pelvic discomfort or abdominal bloating: Some women experience pain or a sensation of fullness in the abdomen, although the type and severity can differ between conditions.
- Overlap with other symptoms: While not identical, there can be some overlap in general discomfort. Endometriosis is more often linked to severe menstrual pain, whereas PCOS is more commonly associated with hormonal symptoms such as acne or excess hair growth.
What Are the Key Differences Between Endometriosis and PCOS?
While endometriosis and PCOS can share some symptoms, they affect the body in different ways. Understanding these differences can help women recognise which condition may be more consistent with their symptoms and why proper medical evaluation is important.
Underlying Cause
Endometriosis occurs when tissue similar to the lining of the uterus grows outside the uterus, often leading to inflammation and pelvic pain. In contrast, PCOS is a hormonal condition that affects how the ovaries function and can disrupt ovulation.
Certain Symptoms
Endometriosis is more commonly associated with severe menstrual cramps, chronic pelvic pain and pain during intercourse. PCOS, on the other hand, is often linked to hormonal symptoms such as acne, excess facial or body hair and difficulty with ovulation.
Menstrual Patterns
Women with endometriosis may still have regular menstrual cycles, although their periods can be particularly painful or heavy. Women with PCOS are more likely to experience irregular or missed periods due to inconsistent ovulation.
Diagnosis
Diagnosing endometriosis may involve imaging tests and, in some cases, minimally invasive surgery such as laparoscopy to confirm the presence of endometrial-like tissue outside the uterus. PCOS is typically diagnosed based on a combination of symptoms, blood tests to assess hormone levels and ultrasound findings.
While the two conditions are distinct, it is possible for some women to have both endometriosis and PCOS. Consulting a gynaecologist can help ensure an accurate diagnosis and an appropriate management plan.
When Should You See a Gynaecologist?
Because endometriosis and PCOS can share similar symptoms, it may not always be easy to identify the underlying cause without a proper medical evaluation. If certain symptoms persist or begin to affect your daily life, it may be helpful to consult a gynaecologist. You may wish to seek medical advice if you experience:
- Severe or worsening menstrual pain that interferes with daily activities.
- Irregular or missed periods.
- Heavy menstrual bleeding or periods that last longer than usual.
- Persistent pelvic pain or discomfort.
- Acne or excess facial or body hair, linked to hormonal changes.
- Difficulty conceiving after trying for some time.
Specialist Care for Both Endometriosis and PCOS
FAQs About Endometriosis and PCOS
Not necessarily. Some women with these conditions may experience noticeable symptoms, while others may have mild or no symptoms at all. In certain cases, the condition may only be identified during medical evaluations for other concerns, such as fertility.
Both conditions are commonly diagnosed during a woman’s reproductive years. PCOS is often identified in the late teenage years or early adulthood when irregular periods become noticeable, while endometriosis may be diagnosed later if persistent pelvic pain or other symptoms prompt further evaluation.
PCOS is generally considered more common and affects an estimated 1 in 10 women of reproductive age. Endometriosis is also relatively common, affecting about 1 in 10 women worldwide, though it is sometimes underdiagnosed due to varying symptoms.
Some women with these conditions may experience pregnancy differently, depending on their overall health and how the condition affects their reproductive system. However, many women with endometriosis or PCOS are still able to have healthy pregnancies with appropriate medical care.

