The Scientist Who Scans Fathers' Brains: Parenthood Shrinks Your Brain and That’s Good (Video)
In this 24 August 2026 published video, host Steven Bartlett talks with Dr. Darby Saxbe, a professor of psychology and a leading researcher on the neuroscience of parenthood. She is the founder and director of the NEST Lab at the University of Southern California, and is also the author of ‘Dad Brain: The New Science of Fatherhood and How it Shapes Men’s Lives’.
What actually happens to your brain, and how fast or slow do you age when you become a parent? Dr. Saxbe reveals the surprising science of the “parental brain” and how fatherhood physically reshapes a man’s mind, why dads lose grey matter, what really happens to testosterone, and why the “dad bod” might be nature’s design.
https://youtu.be/Ppyt3MptX5k
00:00:00 Intro
00:02:33 Role Of Fathers In Parenting
00:06:30 What Happens To The Brain When You Become A Father?
00:09:29 Why Testosterone Drops When Men Become Fathers
00:11:42 Should Men Be Worried About Lower Testosterone?
00:15:59 What Fatherhood Can Change In A Man’s Personality
00:19:20 The Upsides And Downsides Of Parenting
00:21:50 What Happens When We Make Parents Fight?
00:24:08 Why The Birth Experience Can Shape Your Relationship
00:27:45 Are People Waiting For The Perfect Time To Have Kids?
00:31:04 Why Fewer People May Be Choosing Parenthood
00:35:33 Ads
00:37:54 Do Parents Actually Have Healthier Brains?
00:45:22 What Does Daycare Really Mean For Children?
00:47:37 Why Mothers Become The Default Parent
00:49:30 Maternal Gatekeeping And Weaponized Incompetence
00:52:24 What Really Happens To Relationships After A Baby
00:54:47 Why Fathers Can Experience Postpartum Depression
00:57:05 Can Your Personality Predict Whether You’ll Divorce?
01:01:11 Why Women’s Ovulation May Be Harder To Detect
01:03:26 How Can You Increase Your Chances Of Conceiving?
01:04:23 What Every New Father Needs To Know
01:05:11 Ads
01:06:28 How Should Parents Divide Baby Care?
01:08:32 What Couples Should Do Before Having Kids
01:14:03 How To Protect Your Relationship After Having Children
01:16:02 Is The Dad Bod More Attractive?
01:19:14 What Does Your Childhood Teach You About Parenting?
01:21:08 How Divorce Can Affect Children
01:21:25 Are Humans Really Meant To Be Monogamous?
01:22:47 What Are The Biggest Concerns About Modern Parenthood?
01:24:32 What Systemic Change Could Transform Parenting?
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