title: Relationships between the results of a modified sperm penetration test and a swim-up technique and the fertility of ram semen.
abstract: Two relatively simple techniques for the objective measurement of semen quality, and which are easy to apply in the field or laboratory, have been developed: a modified sperm penetration test read by the naked eye and a colorimeter-based swim-up technique. Both the modified sperm penetration and swim-up methods produced promising results in prediction of ram fertility; the modified sperm penetration test was correlated (P<0.05) with a 48-day nonreturn rate and a 60-day conception rate; the correlation between a swim-up velocity and the 60-day conception rate approached significance (r=0.483; 0.1>P>0.05).
authors.affiliation: Department of Animal Science University of New England NSW 2351 Australia.
authors.forename: P
authors.initials: P
authors.lastname: Suttiyotin
authors.forename: C J
authors.initials: CJ
authors.lastname: Thwaites
authors.forename: N D
authors.initials: ND
authors.lastname: Baillie