D of the anatomy of the male and female genital systems
Description of the steps of mitosis and meiosis
Description of the steps of spermatogesis
Description of the steps of oogensis
Description of the steps of fertilization
Description of the steps of implantation
Description of the process of cell devision and morula formaion
Description of formation of yolk sac, umblical cord and placenta
Description of the process of twins formation