Mom and baby are inextricably linked on a physiological level All due to the hormone oxytocin and specific chemical reactions in the brain. This hormone of love and affection plays a part in the formation of the mother-child relationship. The MRI scan just documented the chemical reaction caused by the activation of oxytocin☝🏻 Dopamine, serotonin, and vasopressin are also involved in creating a powerful emotional connection.