Vitrification is a simple and efficient procedure for cryopreservation of embryos, comparing with the slow cooling.It can be easily manipulated and needn t the special freezer.

• 玻璃化冷冻是继常规冷冻方法之后发展起来的一种冷冻方法,它操作简单且不需要高精度的冷冻仪。