

“Dad brain”: How becoming a parent changes the brain, with Darby Saxbe, PhD
57 snips Jun 11, 2025
Darby Saxbe, PhD, an associate professor at USC and director of the NEST Lab, discusses the fascinating brain changes that occur in new parents. She explains how these shifts improve bonding and caregiving but can also bring challenges. Saxbe highlights the benefits of paternity leave, which significantly boost mental health for families. The conversation touches on the neuroprotective advantages of parenthood and the need for policies that support the mental well-being of both parents during this critical transition.
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Parenthood Remodels the Brain
- Parenthood physically remodels the brain, shrinking gray matter to enhance social cognition efficiency.
- Brain changes occur in both mothers and fathers, though more pronounced and including subcortical areas in mothers.
Hormonal Shifts Support Dadhood
- Men experience hormonal shifts like testosterone drops after becoming fathers which encourage nurturing behaviors.
- These hormonal changes benefit relationship quality and paternal involvement, though some men may face mental health risks.
Parenthood Shifts Reproductive Strategy
- Transition to parenthood reduces sexual drive temporarily reflecting a shift from mating to nurturing focus.
- Investing heavily in fewer children is adaptive in stable societies compared to having many offspring.