Frozen Embryo Transfer, FET Cycles After IVF
Not very sexy, but it works
After the embryos are frozen in the controlled-rate
freezer in special straws, they are immersed
and stored in liquid nitrogen in this tank.
Liquid nitrogen is -196ÂºC (or -320ÂºF). That's cold...
When the couple is ready to use their frozen embryos we thaw them and transfer them back to her uterus.