The correct sequence after an egg is fertilized is:
Zygote → Implantation → Fetus → Childbirth.
Fertilization may be defined as the process of fusion of male and female gametes to form a zygote.
The successful fertilization first the zygote becomes a solid ball of cells, then it transforms its shape into a hollow ball of cell called a blastocyst. This leads to the process of implantation. Then the hatching process is carried out through which the development of the fetus is done, then finally the childbirth.
Therefore, the correct sequence is described above after the egg is fertilized.
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