A comparison between the semen and sperm parameters from the captive-bred Vervet monkey (Chlorocebus aethiops) and Rhesus monkey (Macaca mulatta).

Non-human primates have long provided as research models for studying complexities of human reproductive biology. The baseline values reported from this study can be applied as guidelines during the selection of male individuals for reproductive studies. Of further interest is the comparative data on semen and sperm parameters between two congeneric species that differ by seasonal versus aseasonal breeding.