Blastocyst is an advanced form of embryo which is allowed to develop for five days without hindering its growth, which is then followed by blastocyst implantation in the uterus, thus raking up the chances of successful pregnancies while simultaneously lowering the probability of multiple pregnancies to avoid complications. Blastocyst takes roughly around five to six days to develop from the embryo as the result of fertilisation. In this duration, the embryo goes through a developmental stage of division which leads it to differentiate into two, four, eight and then sixteen cell stages respectively until it matures into several hundred cells, ultimately readying it for implantation on the sixth day, initiating pregnancy.