Dr. Kuwayama, inventor of a number of conventional vitrification methods, identified the weaknesses of the most popular imperfect vitrification method, which was the latest at the time, with about 90% survival rates. He then made 18 modifications to it in order to overcome all of the weaknesses of his previous technique, which were also the main causes of egg loss: Thus, the Cryotec Method was born. Safest and most effective in the industry, the Cryotec Method enabled anyone to achieve the best possible outcome without mistake, regardless of their experience or knowledge of vitrification.