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The first part of this article summarizes the research conducted on the infant’s attachment behaviors toward the mother and/or father and parents’ bonding behaviors toward their infant, and the research on the neurobiological mother-child interactions that take place during pregnancy and birth. The second part of the article presents the results of the microanalysis of thirty-one birth videos and interviews with parents. According to the data, infant-parent emotional ties are constructed in three steps at birth. The first step is the attachment and bonding that result from interactions between the defense cascade of the newborn’s FEAR system and the protection and appeasement responses of the mother and/or father’s FEAR and/or CARE systems. The newborn’s most intense reactions, tonic and collapsed immobility, were significantly correlated with prenatal maternal stress (p = 0.015) and could increase the risk of the infant developing physical and mental disorders. The second phase consists of eye contact that may appease the newborn and trigger a tie of love between the newborn and their mother and/or father if they are emotionally available to accept their infant’s gaze. Breastfeeding can be a third step in constructing and, in particular, strengthening the emotional ties between the mother and her child. A first implication of the data concerns antenatal education, which should inform parents of the role of the first interactions following birth in the development of ties. Parents, especially mothers, should be prepared to be emotionally available to soothe their infant and to engage in eye contact with them. For professionals, another implication is that they should not hinder the first interactions between the newborn and their mother and/or father, because they are constitutive of ties of attachment and bonding.