Why does Endometriosis Take so Long to be Diagnosed?

Endometriosis is known for one major issue: it can take years for people to actually get diagnosed. This isn’t random or just bad luck—it’s the result of a mix of medical gaps, social attitudes, and larger systemic issues that still affect women’s healthcare.

The Reality of The Delay

Even with more awareness today, endometriosis still takes a long time to diagnose. The National Library of Medicine notes that diagnosis can range from a few months to over a decade, with many people experiencing delays of “5 to 12 years” from when symptoms start to when they finally receive a diagnosis.

Because of this, a lot of people spend years dealing with symptoms they don’t fully understand, often without clear answers or proper treatment. Over time, this can affect their daily life, mental health, and ability to get the care they actually need.

Symptom Normalization

One of the biggest reasons for this delay is that many symptoms—like painful periods, fatigue, or pelvic pain—are often dismissed as “normal.” The National Library of Medicine explains that this normalization, from both patients and healthcare providers, can lead to delays in both seeking care and getting diagnosed.

Lack of Awareness

Another issue is that endometriosis shows up differently for everyone, which makes it harder to recognize early. The National Library of Medicine points out that “numerous challenges still remain, including the lack of universal diagnostic criteria.”

Yale News also describes endometriosis as “a very common disease that was poorly understood,” which shows how gaps in knowledge still play a role in delayed diagnosis.

Addressing Gender Bias

Gender bias in healthcare is another major factor. Research has shown there is a “persistent health gap, with women being under-diagnosed for certain conditions compared to men.”

Women are often diagnosed later than men, sometimes by several years, which highlights deeper issues in how symptoms are taken seriously. This isn’t just research, it shows up in real experiences. One patient describe

“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 can also be hard to diagnose because it doesn’t always show up on imaging tests. In the past, diagnosis often required surgery, and as Yale News explains, “you couldn’t diagnose it without a surgery,” which made early detection even more difficult.

Diverse Healthcare Teams

Access to care also plays a role. The National Library of Medicine notes that “variations in clinical practice” and differences in healthcare systems can lead to delays in diagnosis.

On top of that, limited access to specialists and long wait times can make the process even longer and more frustrating.

Implications of Delayed Diagnosis

Waiting years for a diagnosis can have serious effects on both physical and mental health. The National Library of Medicine states that

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

Yale News also notes that “we see increased depression and anxiety in women with endometriosis,” which shows how not having answers for so long can take a real emotional toll.

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/.