This paper re-examines the psychic significance of birth through a comparative reading of Freud, Rank, Klein, Winnicott, and contemporary developmental research. It argues that Freud's dismissal of birth anxiety rests on a circular assumption about primary narcissism, whereas Klein's early object-relations theory more convincingly positions birth as the first external source of anxiety. Building on Klein's notion of a rudimentary ego, the paper proposes that birth may constitute the infant's first illusion: an internal wish to exit the womb seemingly “actualised” by the mother's labour. This reframing allows Winnicott's concept of illusion and oneness with the mother to be understood not only as a developmental necessity but also as a defence against the shock of early separateness. Integrating findings from neuroscience, infant research, and observational studies, the paper suggests that proto-egoic organisation and self-other differentiation begin earlier than classical theory assumed. The mother's capacity for containment, hate, and survival becomes central in shaping whether the infant can transform this primordial rupture into psychic growth.