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Pubertal Development Following Paediatric Gonadotoxic Treatment and Immature Testicular Tissue Banking
Emily Delgouffe1, Marius Regin1,2, Veerle Vloeberghs3
1Genetics, Reproduction and Development (GRAD) Research Group, Brussels Health Campus/Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium.
Insights
Testicular tissue banking (TTB) is a safe fertility preservation method for prepubertal boys undergoing gonadotoxic treatments. Studies show TTB does not harm testicular function or structure, enabling normal puberty and testosterone production.
Area of Science:
- Reproductive Medicine
- Paediatric Oncology
- Endocrinology
Background:
- Paediatric gonadotoxic treatments pose risks to male fertility.
- Prospective data on pubertal development post-treatment are limited.
- Immature testicular tissue banking (TTB) is an experimental fertility preservation option for prepubertal boys, but its long-term safety and interaction with treatments require further investigation.
Purpose of the Study:
- To systematically evaluate the long-term safety and effects of TTB on pubertal development in boys treated for malignant or non-malignant conditions.
- To assess the impact of gonadotoxic treatments and TTB on testicular structure, function, and hormonal profiles.
- To provide multidimensional data on pubertal development in this cohort.
Main Methods:
- Single-centre prospective cohort study of 23 boys (2017-2025), with 15 undergoing TTB.
- Repeated assessments included pubertal staging, testicular volumes, parenchymal integrity, reproductive hormones (luteinising hormone, follicle-stimulating hormone, inhibin B, anti-Müllerian hormone, testosterone), bone age, and bone density.
- Median follow-up was 4.0 years.
Main Results:
- Gonadotoxic treatments, especially myeloablative conditioning, were linked to reduced post-pubertal testicular volumes and altered hormone profiles (elevated LH/FSH, reduced inhibin B).
- Anti-Müllerian hormone levels remained stable.
- All patients experienced spontaneous puberty and preserved testosterone production.
- Testicular parenchyma integrity was unaffected by biopsy; volume reductions were comparable between biopsied and non-biopsied testes.
Conclusions:
- TTB appears safe, with no discernible adverse effects on testicular structure or function.
- The procedure does not impede spontaneous puberty or testosterone production.
- Larger multicentric prospective studies are necessary to validate these findings and confirm TTB safety in paediatric populations.
Abstract:
Paediatric gonadotoxic treatments can compromise male fertility, yet prospective data systematically tracking pubertal development are scarce. Immature testicular tissue banking (TTB) has been introduced as an experimental fertility preservation option for (pre-)pubertal boys, but its long-term safety and interaction with gonadotoxic treatment are not fully understood. This single-centre prospective cohort study systematically followed 23 boys, treated for malignant or non-malignant conditions, between 2017 and 2025 [median 4.0 (0.1-6.9) years], including 15 who underwent TTB. Unlike previous studies, this research combined repeated assessments of pubertal staging, testicular volumes, parenchymal integrity, reproductive hormones, and bone age and density, enabling a multidimensional evaluation of pubertal development. Gonadotoxic treatments, particularly myeloablative conditioning, were associated with reduced post-pubertal testicular volumes and altered hormone profiles, including elevated luteinising hormone and follicle-stimulating hormone, and reduced inhibin B, while anti-Müllerian hormone remained largely stable. Puberty occurred spontaneously and testosterone production was preserved in all patients. The testicular parenchyma appeared unaffected by the biopsy, and although some biopsied testes showed lower volumes, similar reductions could be observed in non-biopsied testes. These results support the safety of TTB, with no evident adverse effects on testicular structure or function; however, larger multicentric prospective studies are needed to confirm these findings.
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