Freezing embryos before transfer

Some people choose to preserve their embryos by freezing them for future use or to donate them later. This technique is known as delayed frozen embryo transfer. Once the embryos are formed, the water in them is replaced with cryoprotectant in a process called cryopreservation. Then the Embryologist brings the embryos to its preservation state and they are stored in liquid nitrogen. When the patients are ready to have a baby, the frozen embryo is ‘thawed’ and is transferred to the woman. Research shows that this method has a high rate of success and has a high chance of having healthy babies.