Japanese Journal of Veterinary Research

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Cover Figure
Acute testicular atrophy occurred in a Thoroughbred stallion after being used for ten years at 16 years of age. The number and motility of sperm dramatically decreased and azoospermia occurred. Circulating luteinizing hormone (LH) was high and no increase in circulating testosterone was detected in response to human chorionic gonadotropin (hCG) administration. The number of Leydig cells in the testes increased, but the LH receptor was not detected in Leydig cells. The present study clearly demonstrated that azoospermia occurred in the stallion due to primary hypogonadism, though the exact mechanism is unknown.
See the article by Yuko Toishi et al. on page 43.

Volume 66 Number 1    (2018-2 issued)


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SHORT COMMUNICATION

Acute testicular atrophy in an active Thoroughbred stallion PDF
Toishi, Yuko;Tsunoda, Nobuo;Okamoto, Minoru;Watanabe, Minami;Katagiri, Seiji;Taya, Kazuyoshi 43-51
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Noda, Jun;Izumi, Kenichi;Tamura, Yutaka 57-62