a) Post-thaw motility (grey bars) and adjusted motility index (AMI; dark bars) of rhesus monkey ejaculated sperm samples frozen at a final freezing sperm concentrations of 5 × 108, 5 × 107, and 5 × 106 cells/mL. Values presented were means (± SD) of nine males; b) Post-thaw motility of rhesus monkey ejaculated sperm samples frozen at final freezing sperm concentrations of 1 × 108, 5 × 107, 2.5 × 107, 1.25 × 107 cells/mL. Open symbols represent eight ejaculates from seven males; filled circles represent the means of all ejaculates. Bars or dots with a common superscript were not different (P>0.05).