Theory:

Reproduction in organisms:
YC Editorial - Divya (30).png
Fertilization and Embryo development:
37910.jpg
Human reproduction:
11.jpg
In vitro fertilization:
37120.jpg
Mechanism of In vitro fertilization:
1024px-2902_IVF-02.jpg
Process of cloning:
1024px-Cloning_diagram_english.png
Process of cloning of the Dolly sheep:
sheep.jpg
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