The Study
Alterations in the ultrasound appearance of seminiferous tubules after gonadotropin treatment in patients with azoospermia because of hypogonadotropic hypogonadism
This study looked at 10 guys with a rare hormone problem and noticed that when their testicles looked bigger on ultrasound, sperm sometimes showed up in their pee. But it didn't prove that the treatment made the testicles bigger or caused the sperm — it just saw that both things happened around the same time.
Analysis score
Maximum 58 for a case-control study.
Where the score came from
Doctors used ultrasound to look at tiny tubes inside the testicles of men who couldn't make sperm. They gave them hormones and watched if the tubes got thicker.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 545 / 100
Quality score
Researchers compare people who have a condition (cases) with similar people who do not (controls), looking back in time for differences in exposure. Useful but more prone to bias.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes—this means doctors might be able to tell if treatment is working before waiting months for a semen test, and avoid unnecessary surgery.
- 2When the tubes got thicker than 300 micrometers (about the width of a hair), sperm started appearing in the semen.
- 3The more thick tubes there were, the more sperm there was.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
F&S Reports
Year
2025
Authors
S. Nariyoshi, K. Nakano, G. Sukegawa, Yuji Tsuji
Related Content
Claims (6)
In men with a specific form of infertility caused by low hormone signals, ultrasound scans show that thickened tubes in the testes larger than 300 micrometers appear right before sperm shows up in semen, and the number of these thickened tubes is related to how many sperm are later found.
In men with hypogonadotropic hypogonadism, gonadotropin therapy increases the density of large seminiferous tubules visible on ultrasound, and this increase correlates more closely with sperm count than the overall size of the testicles.
In men with hypogonadotropic hypogonadism, the size of seminiferous tubules measured by ultrasound decreases when gonadotropin therapy is stopped and increases when therapy is restarted, showing that tubule size changes with hormonal levels.
In men with hypogonadotropic hypogonadism who have not produced sperm after 12 to 24 months of gonadotropin treatment, ultrasound findings showing no seminiferous tubules larger than 300 micrometers indicate a low probability of natural sperm production and support decisions about when to proceed with micro-TESE.
Low testosterone levels are linked to lower sperm count and reduced ability to conceive.
In men with hypogonadotropic hypogonadism, thicker seminiferous tubules seen on ultrasound before treatment are linked to a greater likelihood of responding to hCG monotherapy.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.