What is the reason for separation of blostocyte in the prodoction of identical twins?

Identical twins, or monozygotic twins, occur when a single fertilized egg (zygote) undergoes early division into two separate blastocysts. This separation typically happens within the first few days after fertilization, often during the cleavage stage. As a result, each blastocyst develops into a separate embryo, sharing the same genetic material, which leads to the formation of identical twins. The exact reasons for this division can vary, but it is largely a natural occurrence during early embryonic development.