It is a technique in which an embryo is developed in the laboratory for 4-6 days after fertilization before being placed in the womb. The embryo gains many cells as a result of being developed for so many days. The embryo developed for 4-6 days are much more
advanced than the ones developed for just three days. These embryos are called blastocysts.The embryo which survives for 4-6 days is more likely to produce fruitful results. This enables embryologists to select from the more advanced embryos with better potential for implantation.
The biggest advantage of the Blastocyst Culture and Transfer method is that it significantly reduces the risk of multiple pregnancies. Also, the pregnancy and implantation success rate is higher in this technique because it is easy to determine the robust embryos after developing for 4-6 days, hence, only the competent embryo is transferred to the uterus.