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Features include always present findings: Irregularly shaped sperm tail, Coiled sperm flagella, Male infertility, and Reduced sperm motility and others.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Hormones | 1 | Male infertility |
TTC21A function has not been fully characterized.
Spermatogenic failure 37 is associated with mutations in the TTC21A gene on chromosome 3.
Genetic testing for TTC21A is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for spermatogenic failure 37 has been reported in the published literature.
Phenotype severity distribution: 6 always present features.
No clinical trials have been registered for spermatogenic failure 37.
6 publications have been identified in PubMed for spermatogenic failure 37. Research spans Case Report / Case Series (33%), Basic Science / Preclinical (33%), and Diagnostic / Biomarker (17%).
Ruan J (2026). [PMID: 41596239](https://pubmed.ncbi.nlm.nih.gov/41596239/). *International journal of molecular sciences*. [Basic Science / Preclinical]
Gao Y (2026). [PMID: 40847540](https://pubmed.ncbi.nlm.nih.gov/40847540/). *Human reproduction update*. [Review / Meta-Analysis]
Redouane S (2025). [PMID: 39841288](https://pubmed.ncbi.nlm.nih.gov/39841288/). *Molecular biology reports*. [Case Report / Case Series]
Chen Y (2025). [PMID: 41466333](https://pubmed.ncbi.nlm.nih.gov/41466333/). *Human genomics*. [Basic Science / Preclinical]
Yao W (2025). [PMID: 40376536](https://pubmed.ncbi.nlm.nih.gov/40376536/). *Translational andrology and urology*. [Diagnostic / Biomarker]
Data assembled from 5 of 12 sources · Last updated Sep 19, 2026, 4:29 PM UTC
Online Mendelian Inheritance in Man
Genetic and Rare Diseases Info Center