Picture illustrates the ontological status of the preembryo, embryo, and fetus. Dr. Ford (1988) has suggested the term proembryo for this stage of development. It is the preimplantation, post fertilization stage in the human life cycle, where we have at least one new human being, but not yet an individual human being and thus not yet a person. From the formation of the primitive streak (shortly following the completion of implantation), individuality has been determined, however there is debate as to whether this individual human being is, or should be considered, a person.