ABSTRACT: This study aimed to assess the effect of age on semen freezability (sperms motility before
freezing, post-thawing, recovery rate, and straws production per ejaculate) of swamp buffalo bull kept
in Lembang Artificial Insemination Center. A total of 115 ejaculates collected from one swamp buffalo
bull at 5, 6 and 7 years old were included in the study. The results showed that the overall mean values
of sperms motility before freezing, post-thawing, recovery rate, and straws production per ejaculate of
swamp buffalo bull were 62.13%, 43.61%, 62.16%, and 114.16 doses, respectively. The age of bull did
not show significant (P>0.05) effect on sperms motility before freezing, however the sperms motility
post-thawing, recovery rate, and straws production per ejaculate was influenced (P