Perinatal outcome of blastocyst transfer with vitrification using cryoloop: A 4-year follow-up study

The vitrification of blastocyst using cryoloop is a simple, easy, and quick method. This technique yields the same high pregnancy and implantation rates as fresh blastocyst transfer. Congenital defect rate in this study was similar to fresh blastocyst transfer, proving the method to be safe.