Why does Endometriosis Take so Long to be Diagnosed?

Endometriosis is known for one major challenge: it takes years for many individuals to receive a diagnosis. This delay is not accidental. It is the result of medical, social, and systemic factors that continue to impact women’s healthcare.

The Reality of The Delay

Endometriosis is widely recognized as a condition that takes years to diagnose, despite increasing awareness. According to the National Library of Medicine, diagnosis times can range from just a few months to over a decade, with many individuals experiencing delays of "5 to 12 years" from the onset of symptoms to a confirmed diagnosis.

This means many people spend years living with unexplained symptoms, often without answers or appropriate care. These delays can significantly impact quality of life, mental health, and access to effective treatment.

Symptom Normalization

Many symptoms, such as painful periods, fatigue, and pelvic discomfort, are often dismissed as “normal.” According to the National Library of Medicine, this normalization of symptoms by both patients and healthcare providers contributes to delays in seeking care and receiving a diagnosis.

Lack of Awareness

Endometriosis presents differently in each individual, which makes it difficult to recognize early. According to the National Library of Medicine, “numerous challenges still remain, including the lack of universal diagnostic criteria."

Similarly, Yale News highlights that endometriosis is “a very common disease that was poorly understood,” emphasizing how gaps in awareness contribute to delayed diagnosis.

Addressing Gender Bias

Gender bias in healthcare plays a major role in delayed diagnosis, especially for conditions like endometriosis. According to global health research, there is a “persistent health gap, with women being under-diagnosed for certain conditions compared to men."

Research also shows that women are often diagnosed later than men, sometimes by several years, highlighting systemic differences in care.

This bias is reflected in real experiences as well. One patient described

“a yawning 13-year gap of not being believed actually by healthcare providers, being told my symptoms were in my head or part of being a woman, or I was exaggerating.”

Surgical Diagnosis

Endometriosis is not always visible through standard imaging, making diagnosis more complex. Historically, diagnosis often required surgery, and as explained in Yale News, “you couldn’t diagnose it without a surgery,” which created a major barrier to early detection.

Diverse Healthcare Teams

Access to care also plays a role in delayed diagnosis. According to the National Library of Medicine, “variations in clinical practice” and differences in healthcare systems can lead to unnecessary delays.

Limited access to specialists and long wait times further extend the diagnostic process.

Implications of Delayed Diagnosis

Delayed diagnosis can have serious consequences for both physical and mental health. According to the National Library of Medicine,

"The delay can have profound implications for patients, contributing to potentially worsened symptoms, impaired quality of life and increased healthcare costs."

In addition, Yale News reports that “we see increased depression and anxiety in women with endometriosis,” highlighting the emotional toll of living without answers for years.

Resources

Dalton, Meg. “‘A Whole-Body Disease’: Why Endometriosis Is so Difficult to Diagnose and Treat.” Yale News, 13 Nov. 2025, news.yale.edu/2025/11/13/whole-body-disease-why-endometriosis-so-difficult-diagnose-and-treat.

Whiitting, Kate. “5 Conditions That Highlight the Women’s Health Gap.” Gavi, the Vaccine Alliance, 7 Apr. 2026, www.gavi.org/vaccineswork/5-conditions-highlight-womens-health-gap.

De Corte, Pauline, et al. “Time to Diagnose Endometriosis: Current Status, Challenges and Regional Characteristics-A Systematic Literature Review.” BJOG : An International Journal of Obstetrics and Gynaecology, U.S. National Library of Medicine, Jan. 2025, pmc.ncbi.nlm.nih.gov/articles/PMC11625652/.