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Post-thaw motility (a) and adjusted motility index (AMI) (b) of rhesus monkey epididymal sperm samples frozen with 3% glycerol, 2% ethylene glycol (E-glycol), and without permeable cryoprotectants–TEST with 20% (20% EY), 30% egg yolk (30% EY), and TEST alone. Bars sharing the same letter indicate no significant difference.
