Boyden T W, Pamenter R W, Silvert M A
J Reprod Fertil. 1980 May;59(1):25-30. doi: 10.1530/jrf.0.0590025.
A technique is described for perfusion of isolated canine testes. Infusing the testes with various amounts of hCG identified a rate of 0.075 i.u./min as one which reliably increased testosterone secretion into the spermatic venous effluent without producing maximal testosterone production.