How can we operate the transmission of psychoanalytic thinking while training students and professionals to parent-infant psychotherapy? How can some classical Freudian concepts be applied to help the analyst working with dyads, such as defense, transference, infantile sexuality, the role of body ego and super ego in the first year of life? The importance of libidinal pleasure in relation with the mother, the notion of defense towards primitive anxiety and the role of the unconscious maternal functioning are helpful to help the child as well as the parents to regulate their interactions.