Sheep embryos derived from FSH/eCG treatment have a lower in vitro viability after vitrification than those derived from FSH treatment Giovanni Leoni, Luisa Bogliolo, Pierpaolo Pintus, Sergio Ledda and Salvatore NaitanaReprod. Nutr. Dev., 41 3 (2001) 239-246DOI: https://doi.org/10.1051/rnd:2001127