Did storing testicular tissue as a child protect fertility? new study aims to find out

NCT ID NCT04202094

ENROLLING_BY_INVITATION Knowledge-focused Sponsor: Universitair Ziekenhuis Brussel Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study follows 50 young men who had cancer or blood disorders as children and received treatments that can harm fertility. Some stored testicular tissue before treatment; others did not. Researchers will check their fertility through exams, ultrasounds, blood tests, and semen samples to see how the treatments and the tissue storage affected their ability to have children.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If successful, this study could help doctors understand which childhood cancer treatments most affect future fertility and whether storing testicular tissue is worthwhile.
What could go wrong: This is an observational study, not a treatment trial. It only measures fertility outcomes and cannot prove that tissue storage preserves fertility. Results may take years and may not apply to all patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for CHILDHOOD CANCER are added.

Our safety recommendation!

By submitting, you agree to our Terms of use

Conditions

The condition(s) this trial relates to.

childhood malignant neoplasm hematologic disorder neoplasm

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

CHILDHOOD CANCER HEMATOLOGICAL DISORDERS

Contacts and locations

Locations

Universitair Ziekenhuis Brussel

Brussels, 1090, Belgium

More trials for these conditions

Other studies related to the condition(s) this trial covers.