Investigating the effects of immune cell treatment on endometrial health for infertility

Effects of Intrauterine Administration of Autologous Peripheral Blood Mononuclear Cells (PBMC) Modulated With Interferon Tau (IFNt) on Endometrial Cell Populations

NA · Nadezhda Women's Health Hospital · NCT05775211

This study is testing whether a new immune cell treatment can improve the health of the uterus in women who have unexplained infertility to help them get pregnant.

Quick facts

PhaseNA
Study typeInterventional
Enrollment300 (estimated)
Ages18 Years to 50 Years
SexFemale
SponsorNadezhda Women's Health Hospital (other)
Locations1 site (Sofia, Sofia)
Trial IDNCT05775211 on ClinicalTrials.gov

What this trial studies

This clinical trial aims to explore how the administration of autologous peripheral blood mononuclear cells (PBMC) modulated with interferon tau (IFNt) affects the composition of the endometrium during the critical window of implantation in women experiencing unexplained infertility. Female participants will undergo two endometrial biopsies: one prior to the treatment and another after the intrauterine administration of the modulated PBMC. The study will analyze changes in endometrial cell populations using immunohistochemistry techniques to assess the potential impact of this treatment on fertility outcomes.

Who should consider this trial

Good fit: Ideal candidates for this study are women with primary infertility who are undergoing assisted reproductive therapy and have regular menstrual cycles.

Not a fit: Patients with known uterine pathologies, endometrial infections, or autoimmune conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could enhance endometrial receptivity and improve pregnancy rates in women with unexplained infertility.

How similar studies have performed: While the approach of using immunomodulated PBMC is innovative, similar studies have shown promise in enhancing fertility outcomes, suggesting potential for success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Participating in Assisted Reproduction Treatment
* Having primary infertility
* Having regular menstrual cycles
* Having signed informed consent

Exclusion Criteria:

* Uterine pathologies
* Endometrial bacterial infections
* Active endometrial inflammation
* Polycystic ovary syndrome
* Presence of auto antibodies such as anti-TPO (thyroid peroxidase), anti-TG (thyroglobulin), ACA (anticentromere antibodies), APA (antiphospholipid antibodies), ANA (antinuclear antibodies), and anti-dsDNA
* Presence of mutations involving the coagulation system such as deficiency of factor XII, Pro C, Pro S
* Oncological condition
* Positive HIV (human immunodeficiency virus), HCV (hepatitis C virus) or HBV (hepatitis B virus) tests

Where this trial is running

Sofia, Sofia

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Infertility, intrauterine PBMC, interferon tau, endometrium, endometrial cell populations, window of implantation

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.