Fertility of Ram Spermatozoa Frozen in A Tris-Based Diluent

Abstract

Results of two fertility tests are presented. In the first test the mean lambing rates for semen frozen in Tris-glucose-yolk and raffinose-citrate-yolk and for freshdiluted semen were 40'0% (28/70),44'8% (30/67), and 65'7% (46/70) respectively. Double insemination significantly increased the fertility for both frozen and fresh semen.