Episode
Episode 104: Mom Brain Explained: The Science of the Postpartum Brain with Dr. Nikki Pensak
- Podcast
- No One Told Us
- Published
- Jul 9, 2026
- Duration seconds
- 2340
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Summary
What if "mom brain" isn't something to laugh off, but evidence that your brain is undergoing one of the biggest transformations of your life? In this episode, Rachael sits down with clinical psychologist and author Dr. Nikki Pensak to explore the science behind the postpartum brain, why anxiety is so common after having a baby, and what every mother deserves to know about her mental health. Together, they unpack the brain changes that occur during motherhood, why maternal instinct isn't as automatic as we're often told, and how sleep deprivation, stress, and trauma can shape the postpartum experience. Dr. Pensak also shares why healing is possible, how mothers can recognize when they need support, and the hope that can come through post-traumatic growth. Inside this episode: What "mom brain" really is and why it happens How neuroplasticity reshapes the brain during motherhood Why postpartum anxiety is so common and often overlooked The myth of maternal instinct and what actually builds confidence as a parent How stress and sleep deprivation affect the maternal brain Understanding birth trauma and the possibility of post-traumatic growth Signs it may be time to seek support for postpartum anxiety or depression Why self-care is a vital part of maternal mental health How social media can impact new moms….for better and for worse Dr. Nikki's inspiration for writing Rattled and helping mothers feel less alone And so much more! Mentioned in this episode: Rattled by Dr. Nikki Pensak If you enjoyed this episode, please rate 5⭐️ and write us a review! ⬇️ ✨For sleep support and resources, visit heysleepybaby.com and follow @heysleepybaby on Instagram! 😴☁️🤎✨ Rachael is a mom of 3, founder of Hey, Sleepy Baby, and the host of this podcast. Instagram | Tiktok | Website …