Effects of cancer treatments on fertility
Official title: FertiTOX - Platform for Fertility Related Gonadotoxicity of Cancer Therapies
Run by Universitätsklinik fur Frauenheilkunde, Inselspital Bern · NCT05885048 · Data updated 2026-11-12
This study looks at how cancer treatments like chemotherapy and radiation affect fertility in both men and women by checking hormone and sperm levels before and after treatment.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 14 Years to 50 Years |
| Sex | All |
| Enrollment | 7000 (estimated) |
| Sponsor | Universitätsklinik fur Frauenheilkunde, Inselspital Bern Academic / other |
| Drugs / interventions | chemotherapy |
| Locations | 1 site (Bern) |
| Status | Recruiting |
| Started | December 1, 2023 |
| Main results expected | December 31, 2028 |
| Study ends | December 31, 2038 |
| Registry record updated | July 30, 2026 |
| Trial ID | NCT05885048 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include cancer patients aged 14-50 in Austria and Switzerland, and 18-50 in Germany, who are undergoing gonadotoxic therapies.
✕Probably not a fit
Patients who do not consent to participate or have language barriers may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study aims to investigate how gonadotoxic treatments, such as chemotherapy and radiotherapy, impact fertility in cancer patients. It focuses on measuring changes in Anti-Müllerian hormone (AMH) levels in females and sperm concentration in males before and after treatment. The study will collect fertility-related data from various centers in Switzerland, Germany, and Austria over a period of up to 15 years. Data will be gathered through routine clinical care and analyzed to understand the long-term effects of these therapies on reproductive health.
Why it matters
Potential benefit: If successful, this study could provide critical insights into fertility preservation strategies for cancer patients undergoing gonadotoxic treatments.
How similar studies have gone: Other studies have shown varying degrees of success in understanding the impact of gonadotoxic therapies on fertility, making this approach both relevant and necessary.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Patients with cancer or with benign reasons undergoing chemotherapy and/or radiotherapy of the pelvis (females) and the testicles (males) and/or immune therapy; * Willing to participate; * Austria: 14-50 years old (adolescents and adults), Germany: 18-50 years old, Switzerland: 14-50 years old (adolescents and adults); * Serum hormone analysis before gonadotoxic therapy (females) or serum hormone analysis and sperm analysis before gonadotoxic therapy (males). Exclusion Criteria: * Missing consent; * Language barrier.
Where it's running
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University Women's Hospital (Inselspital)
Bern, Switzerland Recruiting
Study contacts
- Principal investigator: Michael von Wolff, Prof. Dr. — Insel Gruppe AG, University Hospital Bern
- Study coordinator: Michael von Wolff, Prof. Dr.
- Email: michael.vonwolff@insel.ch
- Phone: 0041316321301
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
Follicular Flushing During Abdominal Egg Retrieval in Women with Low Egg Reserve
This study tests whether rinsing the egg sacs during abdominal egg collection yields more eggs and more mature eggs for freezing in women with low ovarian reserve.
-
GnRH agonist versus dual hCG/GnRH trigger for ovulation induction in fertility preservation
We will test whether using a GnRH agonist alone or a dual trigger (GnRH agonist plus hCG) gives better egg retrieval numbers and safety for people with cancer doing egg freezing before gonadotoxic treatment.
-
Combining ovarian tissue freezing with egg (oocyte) freezing versus egg freezing alone
This research will test whether combining ovarian tissue freezing with egg freezing helps adult women with cancer preserve more fertility than egg freezing alone.
-
Long-term follow-up of fertility preservation in women after cancer remission
This project will see how fertility preservation options work long-term for women in remission from cancer or hematological disease, including how often preserved material is used and the psychological effects.
-
When to start hormones after stopping combined birth control for planned egg freezing
This trial tests whether taking a two-month break from combined hormonal birth control versus starting ovarian stimulation immediately affects outcomes for ovary-bearing people aged 18–40 who are planning to freeze their eggs.
-
FRAME support for women undergoing fertility care
This pilot will test whether giving women access to the FRAME app and an external support team for six months reduces stress and improves emotional well-being during fertility care.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.