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Updated: Jul 16, 2026

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians
Published on: May 12, 2019
XY male pseudohermaphroditism in a captive Arabian oryx (Oryx leucoryx)
Luis R Padilla1, Christopher J Dutton, Joan Bauman
1Departments of Animal Health, St. Louis Zoo, 1 Government Drive, St. Louis, Missouri 63110, USA.
Abstract:
A 2-yr-old Arabian oryx (Oryx leucoryx) was presented for evaluation of abnormal genitalia and infantile behavior. The oryx had a penis and a scrotum, but testes were not palpable within the scrotum or inguinal canal. The total serum testosterone for the individual was lower than in age-matched males of the same species. Surgical exploration showed markedly hypoplastic intra-abdominal gonads, which demonstrated both testicular and uterine tissue on histologic examination. After karyotype analysis, the individual was classified as an XY male pseudohermaphrodite. This condition resembles two human intersex syndromes: embryonic testicular regression syndrome and partial gonadal dysgenesis syndrome, which occur in familial lines.
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