Blastocyst Transfer is a technique that was introduced in 1988 by Stanford University. Embryos formed as a result of fertilization are cultured in the laboratory for 5-6 days. In this time, the cells of the embryo rapidly divide and on day 5 it is referred to as a Blastocyst.
Transferring a 5-day-old embryo or Blastocyst into a woman’s uterus may improve the chances of implantation and in turn, a successful pregnancy. It also reduces the risk of multiple pregnancies, which is a problem with Assisted Reproductive Techniques (ART) and which pose medical risks for both the mother and the infant along with financial and emotional considerations.
See video below for how Embryos are transferred into a woman’s uterus.