We don’t talk enough about what actually happens to a man when he has a kid. It’s not just about “getting used to it.” It’s patrescence—the distinct, biological process of becoming a father. From remodeling neural pathways to shifts in stress hormones, a dad’s transformation is real, measurable, and essential to his child’s development. Let’s dive into the science behind the paternal identity shift and look at why treating fathers like backup caregivers is costing everyone.