Pesticides and Infertility: Oxidative Stress Via Circulating Cell-free DNA and Gut/Genital Microbiome Signatures in Women With Endometriosis

NCT07471373 · tracked via the Priya Life Science France tracker

Sponsor

Centre Hospitalier Universitaire, Amiens

Phase

Not applicable

Started

2026-02-27

Last updated

2026-05-15

Condition(s) studied

EndometriosisInfertilityFemale FertilityCell Free DNAGenital MicrobiotaVaginal MicrobiotaEndometrial MicrobiotaPesticidesGut MicrobiotaEpigenetics

Investigational drug(s) / intervention(s)

Circulating DNA analysisVaginal microbiota analysisEndometrial microbiota analysisIntestinal microbiota analysisExposure to endocrine disruptors analysis

Circulating DNA analysis: Circulating DNA analysis : For this study, 2 supernumerary EDTA tubes (10mL) of blood samples will be taken as part of the infectious workup.

Vaginal microbiota analysis: Vaginal microbiota analysis : In the study, a supernumerary vaginal sample from an endocervical smear will be taken as part of the biological workup.

Endometrial microbiota analysis: Endometrial microbiota analysis : As part of the study, an endometrial sample from a uterine rinse will be required. This flushing is a medical procedure performed outside the standard infertility or MAP management procedure and will only be carried out by a gynecologist once the patient has been included in the study and written consent has been received from the patient.

Intestinal microbiota analysis: Intestinal microbiota analysis (secondary objective): As part of the study, a fecal sample from a patient will be required. This donation is a voluntary act on the part of the patient, outside the standard procedure for infertility treatment or MAP, and will be requested after the patient has been informed of the purpose of the procedure. Once the SHIME has been inoculated, patient donation will be no longer necessary and won't be requested from subsequent patients.

Exposure to endocrine disruptors analysis: Exposure to endocrine disruptors analysis (secondary objective): The patient will be asked to donate a hair sample. This donation is a non-medical act performed outside the standard procedure for infertility management or MAP. In addition to hair sampling, a questionnaire on household characteristics, environment and possible exposure to endocrine disruptors will be given

Study summary

This project PestiEndoMicro aims to provide an innovative approach, studying endometriosis under the genital and gut microbiota scope. To realize this project, the investigators are planning to dose cfDNA to assess the oxidative stress caused by endometriosis and study its epigenetics. At the same time, the investigators will take a pragmatic approach by assessing pesticide exposure in these patients and estimate the correlation between gut or genital dysbiosis and chemical agent exposure. Also, the investigators will take the initiative to use classic culture, qPCR techniques, and NGS to establish signatures in vaginal, endometrial and gut microbiota in patients with endometriosis. With these approaches, the goal is to gain more knowledge about endometriosis and optimize early diagnosis by establishing a signature in the genital and gut microbiota, but also by dosing the cfDNA. By doing so the investigators could open new opportunities to develop new therapeutic strategies for endometriosis.

Eligibility

Sex

FEMALE

Min age

18 Years

Max age

43 Years

Healthy volunteers

Accepted

Inclusion Criteria: * The "case" group will include: * All women aged 18 to 43, with confirmed endometriosis and endometriosis grade 3 or 4 as defined by the 1985 revised version of the American Society of Reproductive Medicine. * The "control" group will include: * All women aged between 18 and 43, whose infertility problem is proven male infertility and who do not have endometriosis identified by biological, genetic and clinical tests. * The following criteria will apply to both groups: * All women who have not received antibiotic treatment in the three months preceding inclusion and who are not participating in any pharmacological study. * All women who are covered under the national social security health insurance scheme. * All women who have signed a written informed consent form, thereby confirming their participation in the study after a period of free and informed reflection. Exclusion Criteria: * All women aged 44 and over. * Women who are overweight, obese or anorexic. * Women taking antibiotics 3 months prior to inclusion, or participating in a drug study. * All women under anti-GnRH treatment, pregnant or suffering from a chronic inflammatory disease such as Crohn's disease, polycystic ovary syndrome, etc. * All women whose endometriosis has not been formally confirmed by the tests offered by the Reproductive Medicine and Biology Department, CECOS de Picardie, CHU Amiens-Picardie. * All patients under guardianship, curators or safeguard of justice. * All patients who have not signed the written consent confirming their participation in the study, after a period of free and informed reflection. * Any patient who withdraws her consent for participation in the study.

Primary outcome measure(s)

quantification of circulating free DNA (cfDNA) between both groups — 2 years
The primary outcome will be the evaluation of oxidative stress by quantification of circulating free DNA (cfDNA) between patients in the control group and patients with endometriosis and will be established in ng/mL of plasma.

Trial sites (1)

Facility	City	Region	Status
CHRU Amiens	Salouël	France	Recruiting

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Official registry record

This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

View NCT07471373 on ClinicalTrials.gov ↗ ← All trials in France