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Reproduction in organisms:

Fertilization and Embryo development:

Human reproduction:

In vitro fertilization:

Mechanism of In vitro fertilization:

Process of cloning:

Process of cloning of the Dolly sheep:

Reference:
https://www.freepik.com/free-vector/egg-fertilization-process-flat-template_9586806.htm#page=1&query=fertilization&position=29
https://www.freepik.com/free-vector/vitro-fertilization-process-concept_9580990.htm#page=1&query=fertilization&position=23
https://commons.wikimedia.org/wiki/File:2902_IVF-02.jpg
https://commons.wikimedia.org/wiki/File:Biological_Life_Cycle_of_Humans.svg
https://upload.wikimedia.org/wikipedia/commons/8/8c/Dolly_clone.svg
https://upload.wikimedia.org/wikipedia/commons/thumb/6/6b/Cloning_diagram_english.png/1024px-Cloning_diagram_english.png