Prime purpose of this lecture is to presentation on Human Development. Other objectives are explain the stages of development starting with fertilization and ending with the neonatal period. Here also analysis the major events of the first, second, and third trimesters of development. Finally discuss on the changes occurring in some organs as the infant goes from life in utero to neonate. This lecture briefly analysis on Human Development process: Formation of Extra-embryonic Membranes, Placentation, Embryogenesis, Labor and Delivery.