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September 10, 2025Irish Veterinary JournalOpen Access

XXX/XY chimerism with urogenital malformations in a Japanese black calf

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Key Points

The calf presented with ambiguous genitalia and hypospadias-like features, indicating significant reproductive anomalies.
Chromosomal analysis revealed a 63:37 ratio of XY to XXX cells, highlighting the unique chimeric condition.
Clinical examination identified both male and female reproductive structures, showcasing a complex phenotypic outcome.
This case underscores the importance of genetic diagnostics in understanding congenital reproductive anomalies in livestock.

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Implication

This case reveals complex urogenital malformations due to XXX/XY chimerism in a calf, suggesting implications for bovine sex determination.

Cite This Study

Kanno et al. (2025) studied this question.

synapsesocial.com/papers/68c1d24654b1d3bfb60f845e https://doi.org/10.1186/s13620-025-00301-7

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Also Consider

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1The Japanese Wagyu beef industry: current situation and future prospects — A reviewReview · 2018 · 137 citations
2Male pseudohermaphroditism in a complex malformed calf born with an acardius amorphus cotwin—a case reportCase Report · 2023 · 2 citations
3Cytogenetic screening of livestock populations in Europe: an overviewReview · 2008 · 137 citations