NCT07509840 Immunomodulatory Therapy to Restore Ovarian Function and Improve Fertility in Women With Autoimmune Premature Ovarian Insufficiency

Eligibility & Interventions

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What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

Phase 3 trials are large pivotal studies comparing the treatment to current standard of care or placebo. Your participation directly contributes to the evidence needed for regulatory approval.

This trial targets 40 participants in total. It began in 2026-02-12 with a primary completion date of 2031-12-31.

Brief Summary

Several autoimmune diseases such as Addison's disease are associated with failing ovarian function, known as premature ovarian insufficiency (POI), which can lead to early menopause and reduced fertility.The underlying cause of POI in these women is considered to be an immunological attack on the ovaries that causes them to not respond to hormonal stimulation from the brain. Hormone replacement effectively counteracts menopausal symptoms, but today there is no treatment to normalize or even improve fertility. As a patient with POI and an autoimmune diagnosis and the desire to become pregnant, you are asked to participate in the study. The aim of this study is to investigate whether immunomodulatory therapy can improve and ideally normalize ovarian function in women of childbearing age with autoimmune disease and proven POI. Patients with a male partner and a desire for children and who respond positively to the first ovarian stimulation will be offered in vitro fertilization (IVF) and will thus be allowed to complete the study. Other participating patients will undergo a total of three ovarian stimulations and treatment with first two infusions of the registered drug rituximab or placebo (inactive agent) and later two additional infusions where all patients receive rituximab. The first two infusions with rituximab or placebo are double-blind, which means that neither you nor the study staff know what you have received. Follow-up takes place up to 12 months after the last infusion.

Eligibility Criteria

Inclusion Criteria: 1. The subject has given their written consent to participate in the trial 2. Autoimmune POI (FSH \> 25 IU/L) including the presence of oligo/amenorrhea lasting at least 4 months, and elevated FSH levels (FSH \> 25 IU/L) confirmed on two separate occasions, with measurements taken at least 4 weeks apart and Addison's disease or ab positivity for 21-hydroxylase or other relevant autoantibodies (SCC, 17-OH, NALP5) 3. 18-38 years of age 4. Body mass index between 19-30 5. Willing to use effective non-hormonal contraceptive (such as intra uterine device (IUD), sexual abstinence, male or female condom with or without spermicide, cap, diaphragm or sponge with spermicide) method during the 18-month study period Exclusion Criteria: 1. Hypersensitivity to rituximab, any of the AxMPs, or any of the excipients (as detailed in the SmPC for the various IMPs) 2. Active, severe infection or JCV positivity 3. Active hepatitis B infection 4. Severe immunosuppression 5. Severe cardiac disease 6. Cancer 7. Benign tumours of the hypothalamus, pituitary, or ovarian pathology 8. Vaginal bleeding of unknown etiology 9. Hormone replacement therapy within four weeks prior study entry 10. Pregnant or lactating women 11. Concurrent treatment with other immunosuppressive drugs 12. Any vaccination within 4 weeks of infusion of study medication 13. Severe psychiatric disorder 14. Any condition or any circumstance that in the opinion of the investigator would make it unsafe to undergo treatment with rituximab or controlled ovarian hyperstimulation 15. Active thrombolic disorder (contraindicated for Ovirelle) 16. Moderate or severe impairment of kidney or liver function (contraindicated for Orgalutran) \-

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