Intensive longitudinal video observations of infants and mothers in the natural context of a morning nursery make possible detailed study of many early psychological developments. This paper expands on the observations of Mahler et al. on hatching and discusses it as a time of bio-perceptual-affective integration. I have traced the development of state of consciousness, perception, motor skills, perceptual-motor coordinations, cognition, and affect as they progress toward this integration. Hatching is discussed as a new psychological organization which marks the boundary between symbiosis and early practicing in the separation-individuation progression. This paper proposes hatching as a critical organizer in the early months. These observations enable us to begin a practical synthesis of observational data of perceptual-motor-cognitive developments and the psychoanalytic theory of the development of affects and object relations.