EMBRYOLOGY AND FETAL DEVELOPMENT EMBRYOLOGY AND FETAL DEVELOPMENT A) Oogenesis Oogenesis is the process in which the development of mature ovum (female reproductive cell) takes place. Oogenesis is a process that starts during the development of the embryo itself. Primordial germ cells develop when an embryo develops in a pregnant woman. In female gonads, germ cells undergo a rapid mitotic division (a type of division in which two daughter cells