Theriogenology 2019 Apr 1;129:160-167. Epub 2019 Mar 1.
Departamento de Reproducción Animal, SGIT-INIA, Avda. Puerta de Hierro km 5.9, 28040, Madrid, Spain. Electronic address:
This study compares the effectiveness of the ultra-rapid and conventional freezing of sperm from captive bovids, giraffids, cervids, ursids, a cercopithecid, a delphinid and a phascolarctid. The relationship between sperm head dimensions and cryosurvival was also examined. Compared to conventional freezing, the ultra-rapid freezing of epididymal sperm from the dama gazelle, giraffe and brown bear returned higher cryoresistance ratios (CR, the ratio, in percentage, between the value of the variable after thawing/value before thawing) for sperm viability and motility. Read More