What is the prevalence of Endometriosis?

Endometriosis is a common, chronic condition estimated to affect approximately 10% (190 million) of reproductive-age women and girls globally, according to the World Health Organization. While not classified as a rare disease, the true prevalence of endometriosis is difficult to determine because it often remains underdiagnosed, misdiagnosed, or asymptomatic for years.

How common is endometriosis and who does it affect?

Endometriosis is not considered a rare disease; it is a widespread condition that predominantly affects individuals assigned female at birth. While the global estimate is 10% of those of reproductive age, data from clinical studies suggest that prevalence can be significantly higher—ranging from 30% to 50%—among individuals experiencing chronic pelvic pain or infertility. Because endometriosis is hormone-dependent, the onset of symptoms typically occurs after menarche, though it can manifest in adolescents. It is rare for endometriosis to be diagnosed in prepubertal children or postmenopausal individuals, though not impossible.

Are there geographic or ethnic variations in the prevalence of endometriosis?

Current epidemiological data does not suggest that endometriosis is limited to specific geographic regions or ethnic groups. However, some studies indicate potential variations in diagnostic rates across different populations, which are often attributed to disparities in healthcare access, cultural perceptions of menstrual pain, and the availability of specialized diagnostic tools like laparoscopy. It is crucial to note that current research efforts are working to move beyond historical biases to better understand the true global burden of endometriosis across all demographics.

Why is accurate prevalence data for endometriosis so challenging to obtain?

Estimating the exact number of people living with endometriosis is notoriously difficult due to several systemic barriers:

• Diagnostic Delay: The average time from symptom onset to a definitive diagnosis is often 7 to 10 years.


• Need for Surgery: The gold standard for diagnosis is surgical visualization (laparoscopy), which is invasive and not always pursued for mild cases.


• Symptom Normalization: Many individuals are told that severe pelvic pain is "normal" for menstruation, leading them to delay seeking medical evaluation.


• Asymptomatic Cases: Some individuals may have endometriosis but remain asymptomatic, meaning they are never included in clinical prevalence counts.

How does the DiseaseMaps community reflect the experience of endometriosis?

While global statistics provide a broad overview, the lived experience of patients often reveals the reality behind the numbers. Currently, 1,727 people with endometriosis have joined the DiseaseMaps.org community to share their personal journeys. This real-world data highlights that while endometriosis is "common" in medical textbooks, the individual experience is often one of isolation and a long search for answers, underscoring the importance of patient-led platforms in mapping the true impact of this chronic condition.

Next steps

• Consult a gynecologist or a specialist in reproductive endocrinology if you experience debilitating pelvic pain or infertility.


• Keep a detailed symptom diary to track pain patterns relative to your menstrual cycle, which can assist physicians in their assessment.


• Join the 1,727 members on DiseaseMaps.org to connect with others who understand the challenges of living with endometriosis.


• Seek out resources from reputable patient advocacy groups, such as the Endometriosis Foundation of America, to stay informed about the latest clinical research.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician with any questions regarding a medical condition.

References

• World Health Organization (WHO): Endometriosis Fact Sheet.


• NIH Genetic and Rare Diseases Information Center (GARD): Endometriosis Overview.


• Orphanet: Information on the epidemiological profile of endometriosis.


• Journal of Obstetrics and Gynaecology Canada: Prevalence and diagnostic delay in endometriosis.