Becoming a parent changes just about every aspect of life. But it doesn’t just change your routines, priorities, and relationships—it can actually change your brain and body. And while we’ve long recognized the profound biological transformation that accompanies motherhood, we’re only beginning to understand what happens to men when they become fathers. So what exactly is a “dad brain?” How does fatherhood reshape the male brain, hormones, and even the body?My guest is Darby Saxbe, a clinical psychologist and tenured full professor of psychology at the University of Southern California. She has published over eighty scientific articles in peer-reviewed journals. Her research focuses on the transition to parenthood, particularly the neural and hormonal underpinnings of fatherhood. Her latest book is titled Dad Brain: The New Science of Fatherhood and How It Shapes Men’s Lives.Some of the specific topics we cover include:How (and why) does becoming a parent change the brain?How similar are “dad brain” and “mom brain?"What happens to testosterone when men become fathers?Is there a biological reason for the "dad bod?"You can visit Darby's website to learn more about Dad Brain and follow her on Instagram @darbysaxbephdGot a sex question? Send me a podcast voicemail to have it answered on a future episode at speakpipe.com/sexandpsychology.***Thank you to our sponsors! Cozy Earth’s Labor Day Sale is happening now through September 8th. Head to cozyearth.com and use my code JUSTIN for an exclusive 30% off, the biggest savings of the season. And if you see a post-purchase survey, mention that you heard about Cozy Earth right here!Born from over 10 years of longevity research, OneSkin is helping you unlock your healthiest skin now and as you age. Get 15% off OneSkin with the code JUSTIN at https://www.oneskin.co/justinThe Kinsey Institute is where the world turns to understand sex and relationships. You can help continue its expert-led research by donating to the Kinsey Institute Research Fund. Learn more and make a donation here: https://give.myiu.org/centers-institutes/I380010749.html ***Want to learn more about Sex and Psychology? Click here for previous articles or follow the blog on Facebook, Twitter, or Bluesky to receive updates. You can also follow Dr. Lehmiller on YouTube and Instagram.Listen and stream all episodes on Apple, Spotify, or Amazon. Subscribe to automatically receive new episodes and please rate and review the podcast!Credits: Precision Podcasting (Podcast editing) and Shutterstock/Florian (Music). Image created with Canva; photos used with permission of guest.

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