Coveney D, Shaw G, Renfree M. Effects of oestrogen treatment on testicular descent, inguinal closure and prostatic development in a male marsupial, Macropus eugenii. Reproduction. 2002;124:73-83 pubmed
..Therefore, the tammar wallaby may provide a useful experimental model animal in which to investigate the hormonal control of testicular migration and closure of the inguinal canal. ..