Instant Genius The science behind PMS, and how to beat it
Aug 10, 2025
In this engaging conversation with Dr. Sarah Hill, an evolutionary psychologist and author of 'This Is Your Brain on Birth Control,' listeners explore the complexities of the luteal phase in the menstrual cycle. Hill discusses why PMS gets such a bad rap, delving into the hormonal shifts and their effects on mood and energy. She offers practical tips to manage symptoms and empowers women to embrace their cyclical changes. The discussion also touches on cycle syncing for fitness and how understanding these patterns can enhance well-being.
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What The Luteal Phase Is
- The luteal phase is the last two weeks of the cycle when progesterone dominates.
- It prepares the body for possible pregnancy.
Brain Turns Up Threat Sensitivity
- Progesterone lowers the brain's threshold for threat during the luteal phase.
- This makes social signals from partners feel riskier than usual.
Relationship Anxiety Peaks Pre-Period
- Social and emotional sensitivity rises in the luteal phase, increasing jealousy and attachment worries.
- This reflects protective evolution, not weakness.
