Background:Eggs and embryos can now be stored and thawed more successfully than before. Until recently, "slow freezing" technology also known as cryopreservation was used to freeze embryos and eggs. This has now been supplanted with Vitrification (VTF), a more advanced technology that is generally regarded as the best method for cryopreservation. Hence more study is warranted to get more in-depth knowledge on the VTF and thawing aspects.