*These cryoprotectants were added into calcium free PB1 supplemented with 20% FCS. # These cryoprotectants were added into calcium free PB1 supplemented with 20% FCS and 0.5 M sucrose.
Survival and cleavage after IVF of cumulus-enclosed porcine oocytes vitrified either at the GV stage before IVM (GV-vitrified) or at the zygote stage after IVM/IVF (Zyg-vitrified).