were evaluated for each sample results from the bead testing suggested that enrichment for healthy sperm based on motility and membrane status was feasible depending on the bead type used with reference to fig1 a comparison of motility of non bound sperm after treatment with beads to control sperm not exposed to any bead indicated that the percentage of motile sperm increased by u02dc 20 or more in samples exposed to either the flowcomp u2122 beads biomag u00ae particles or macs u00ae microbeads whereas co incubating sperm with s pluribeads u00ae m pluribeads u00ae or dynabeads u00ae had little to no effect on motility in the non bound sperm population results from evaluation of the membrane status on the non bound sperm see fig2 showed that after exposing sperm to either s pluribeads u00ae flowcomp u2122 beads biomag u00ae particles or the macs u00ae microbeads the percent of sperm with intact acrosome and plasma membranes was increased by u02dc 14 or higher whereas m pluribeads u00ae or dynabeads u00ae had little to no effect example 2 improving frozen thawed semen using macs u00ae microbeads in presence of extender to further test the efficacy of removing unhealthy sperm using the macs u00ae microbeads two types of coatings were tested annexin v or anti rabbit igg on sperm from 4 different bulls prior to incubation.