Blastocyst is an embryo which has developed to day 5 stage with different cell components and a fluid cavity. Human embryos from in vitro fertilisation in culture in an IVF lab usually reach blastocyst stage by day 5 after fertilisation. At blastocyst stage of development, the embryo must reach before it can implant in the uterus, Blastocyst embryos have the best potential for implantation. Blastocyst culture offers single embryo transfer and significantly reduce the risk of multiple pregnancy. On the other-way
Blastocyst culture can help to determine which embryos have the best chance of being able to implant.