Post-warming survival rates and clinical outcomes of human cleavage stage embryos vitrified/warmed using CryoTouch and Cryotop methods oleh Somayeh Keshavarzi, Azadeh Dokht Eftekhari, Hajar Vahabzadeh, Marzieh Mehrafza, Robabeh Taheripanah, Masoumeh Asgharnia, Sahar Esfandyari, Alaleh Ghazifard, Hossein Hosseinirad, Shahrokh Paktinat