驯鹿（Rangifer tarandus）的睾丸异常。

J Reprod Fertil. 1979 Sep;57(1):127-30. doi: 10.1530/jrf.0.0570127.

In a sample of reindeer from South Georgia, 4 males were abnormal in that 1 had bilateral cryptorchid testis, 2 each had 1 cryptorchid testis and 1 had a vestigial testis. The antlers of the cryptorchid males were small, but the antler cycle itself was hardly affected.

在一组来自南乔治亚岛的驯鹿样本中，4只雄性存在异常，其中1只双侧隐睾，2只各有1个隐睾，1只睾丸发育不全。隐睾雄性的鹿角较小，但鹿角周期本身几乎未受影响。