I have been using Cryotech vitrification since one and half years Cryotech and it not only has great results with embryos but also oocytes. I am getting nearly 100% survival in younger women, i.e., below 35 years and almost 90 to 95% survival in middle-aged women, i.e., above 35 years. I strongly recommend using Cryotech vitrification as well as warming for both embryos and oocytes.

Embryologist