Select the option that gives the correct identification of ovum, morula, and blastocyst in a human female reproduction system as shown in the following diagram:
\textit{(Refer to the provided diagram.)}
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The ovum is released during ovulation. After fertilization, it progresses through the morula stage to form the blastocyst before implantation.
Reproductive system development stages in females: Ovum (A): Unfertilized egg.
Morula (E): Solid cellular mass formed by fertilized egg cleavage.
Blastocyst (G): Structure implanting in the uterine wall for further development.