Clinical trial Recruiting at 3 sites Interventional Ages 3 Months to 18 Men only

Preserving fertility in boys undergoing cancer treatment

Official title: Male Fertility Preservation Using Cryopreservation of Testicular Tissue Before Highly Gonadotoxic Cancer Treatment

Run by University Hospital, Geneva · NCT03180918 · Data updated 2026-11-12

This study is testing a way to help young boys with cancer keep their ability to have children in the future by freezing their testicular tissue before treatment.

Quick facts

Study typeInterventional
Ages3 Months to 18 Years
SexMen only
Enrollment100 (estimated)
SponsorUniversity Hospital, Geneva
Academic / other
Locations3 sites (Basel and 2 other locations)
StatusRecruiting
StartedJanuary 2015
Main results expectedJanuary 2100
Study endsJanuary 2100
Registry record updatedMay 27, 2026
Trial IDNCT03180918 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include prepubertal boys aged 3 months and older and peri-pubertal patients who have failed sperm cryopreservation and are at high risk of infertility.

Probably not a fit

Patients under the age of 3 months or those whose treatments are not highly gonadotoxic 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 study focuses on preserving fertility in prepubertal boys who are at risk of infertility due to highly gonadotoxic cancer treatments. It involves the cryopreservation of testicular tissue through biopsy, allowing for the potential future restoration of fertility. The study also aims to create a database for clinical and biological follow-up data and establish a biobank for future research. It is a multicentric effort involving several hospitals in Switzerland.

Why it matters

Potential benefit: If successful, this approach could help preserve fertility for young boys facing cancer treatments, offering them hope for future parenthood.

How similar studies have gone: Other studies have explored fertility preservation in cancer patients, but this specific approach of testicular tissue cryopreservation in prepubertal boys is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Prepubertal patients aged 3 months and older
* Peri and pubertal patients after failure of sperm cryopreservation
* Patients presenting high risk of infertility because of gonadotoxic treatments (i.e high dose of alkylating agents, testicular irradiation, total body irradiation).
* Multidisciplinary team consensus in favour of proposition to cryopreserve testicular tissue

Exclusion Criteria:

* Patients under the age of 3 months
* Refusal of the patient and/or his parents
* Treatments that are not highly gonadotoxic

Where it's running

  • Ukbb
    Basel, Switzerland
    Recruiting
  • Geneva University Hospitals
    Geneva, Switzerland
    Recruiting
  • Chuv
    Lausanne, Switzerland
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.