Embryo freezing is accomplished by a process called “vitrification” which is “flash freezing” to remove the water from the embryo and replace it with a solution to maintain the integrity of the embryo.  The survival rate after vitrification is greater than 95%.

Vitrified embryos have similar success rates to fresh embryos.

Indications:

  1. Fertility preservation
  2. Genetic testing (CCS/PGS/PGD): embryos must be stored to await results
  3. Storage of surplus embryos from an IVF cycle
  4. Delay of embryo transfer for medical or other reasons after a fresh IVF cycle