Pollutants in the blood and endometriosis severity in women
Looks at blood levels of pollutants and how severe endometriosis is in adults.
Plain-language title generated from the registry record
Registry title: Exposure to Persistent Organic Pollutants and Severity of Endometriosis in the ComPaRe-Endometriosis Cohort
Key facts
- Where
- Paris, FranceSee the site
Where in France
- Hôpital Paris Saint JosephParis, FranceNo longer taking part
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Institut National de la Santé Et de la Recherche Médicale, France
- Trial code
- NCT06973603
- Record updated
- 16 September 2026
- Original description
Endometriosis is a chronic inflammatory disease affecting ~10% of women of childbearing age. It is characterized by the presence of endometrial-like tissue outside the uterus, causing lesions and adhesions between the organs, and is often accompanied by intense pain and sometimes infertility. The four-stage classification based on the severity of lesions does not always reflect the severity of symptoms. Adenomyosis, a similar pathology, is often present in the same patients, although it is now considered distinct from endometriosis. Diagnosis usually takes a long time, with an average delay of 7 years. The cause of the disease remains unknown, but hormonal, genetic and environmental factors, such as exposure to endocrine disruptors, are suspected. Persistent organic pollutants (POPs), such as dioxins and PCBs, may influence the risk and severity of the disease. Although experimental studies suggest a link between these substances and the progression of endometriosis, epidemiological research on the subject is still limited.Read full original descriptionShow less
Exposure to Persistent Organic Pollutants and Severity of Endometriosis in the ComPaRe-Endometriosis Cohort
Endometriosis is a chronic inflammatory disease affecting ~10% of women of childbearing age. It is characterized by the presence of endometrial-like tissue outside the uterus, causing lesions and adhesions between the organs, and is often accompanied by intense pain and sometimes infertility. The four-stage classification based on the severity of lesions does not always reflect the severity of symptoms. Adenomyosis, a similar pathology, is often present in the same patients, although it is now considered distinct from endometriosis. Diagnosis usually takes a long time, with an average delay of 7 years. The cause of the disease remains unknown, but hormonal, genetic and environmental factors, such as exposure to endocrine disruptors, are suspected. Persistent organic pollutants (POPs), such as dioxins and PCBs, may influence the risk and severity of the disease. Although experimental studies suggest a link between these substances and the progression of endometriosis, epidemiological research on the subject is still limited.
The central hypothesis of the POPENDO project is that higher concentrations of persistent organic pollutants (POPs) are associated with increased severity of endometriosis. The aim of the study is to explore the associations between serum levels of four families of POPs (PCBs, organochlorine pesticides, PFAS and BFR) and endometriosis.
Inclusion: ComPaRe participants ⩾ 18 years old. All ComPaRe participants are at least 18 years of age, so our research participants will all be adults; Having declared in ComPaRe that they had endometriosis; Living in the Ile-de-France region (departments 75, 77, 78, 91, 92, 93, 94 or 95); Have given electronic consent stating: "By checking this box, I agree to be solicited for research outside ComPaRe"; This criterion is collected at the time of ComPaRe registration, when consent is collected. Participants can withdraw this consent at any time on their secure personal online account on the ComPaRe platform; Aged ≤ 45 years to avoid including premenopausal or menopausal women; In possession of MRI images used to diagnose their endometriosis (CD-ROM) that are no more than 5 years old; Enrolled in or benefiting from a social security scheme.
Exclusion: Hemophilia/coagulation disorders/anticoagulant use; People with HIV, HBV or HCV will not be included in this study due to the risk of BSE (Blood Exposure Accident); People suffering from any of the following diseases:; Cancer; Morbid obesity (BMI>40); Non-alcoholic steatohepatitis (NASH); - People with contraindications to blood sampling will not be included in this research:; Known severe anemia; Based on factors that may disrupt lipid dynamics and lipid pollutants, the following individuals will not be included:; Pregnant and breast-feeding women; Persons under court protection/guardianship/guardianship will not be able to participate in this research.