Table 1. Laboratory species yielding offspring following the transfer of cryopreserved embryos [4].

Species	Cryopreservation method	Cryoprotective agents	Authors	Year	References
Mouse	Slow freezing	1 M DMSO	Whittingham et al.	1972	[5]
Rabbit	Slow freezing	1.6 M DMSO	Bank et al.	1974	[6]
Rat	Slow freezing	1.5 M DMSO	Whittingham et al.	1975	[7]
Mastomys	Vitrification (2-step)	20% EG+F+S and 40% EG+F+S	Mochida et al.	1998	[14, 15]
Hamster	Vitrification (2-step)	10% DMSO+10% EG and 20% DMSO+20% EG+F+S	Lane et al.	1999	[16, 17]
Mongolian gerbil	Vitrification (2-step)	20% EG+F+S and 40% EG+F+S	Mochida et al.	1999	[18, 19]

DMSO, dimethyl sulfoxide; EG, ethylene glycol; F, Ficoll; S, sucrose.