In Human blastocyst Formation begins about 1 Day after fertilization when a fluid-filled cavity opens up into a morula a ball of cells.

• About 1 day after blastocyst formation it begins to embed into the endometrium of the uterine wall where it will undergo further Developmental Process.
• The use of blastocyst in IVF involves culturing a Fertilized egg for five days before transferring it into the uterus. It can be a more vocal method of fertility treatment.