“…Furthermore, 5 of the 25 most endangered primate species in the world live in the Neotropics (Schwitzer et al, ), and yet no standard sperm cryopreservation protocols have been described for these species. In the literature a few studies have investigated sperm freezing in species like squirrel monkeys, spider monkeys, howler monkey, capuchin monkey, marmosets, and tamarins (Arakaki, Nichi et al, ; Carvalho, ; Denis, Poindexter, Ritter, Seager, & Deter, ; Leão et al, ; Morrell et al, ; O'Brien, Hollinshead, Evans, Evans, & Maxwell, ; Oliveira et al, ; Oliveira, Leão, Almeida, Santos, & Domingues, ; Sankai, Tsuchiya, Ogonuki, Cho, & Yoshikawa, ; Silva et al, ; Yeoman, Ricker, Hossain, & Abee, ). However, the variety of protocols and their respective outcomes (Table ) makes it difficult to reach a consensus regarding an ideal method designed to routinely cryopreserve sperm from these primates.…”