Molly Webster investigated the claim that menstrual cycles alter the female brain monthly. Her reporting journey explored sex hormones and their impact on both female and male brains. This involved meticulous self-experimentation and touched upon topics like PTSD. The investigation ultimately revealed a novel biological approach to self-care. It highlighted the pervasive influence of fluctuating internal chemicals, specifically hormones. Several key experiments, including 28andMe, 28andOC, and 28andHe, were conducted in Emily Jacobs' lab. Dr. Catherine Woolley's pioneering work in sex hormones and the brain was also a significant reference. The episode acknowledged research on sex bias in neuroscience and biomedical studies. Further details about the scientific experiments and related research are provided. Ultimately, the piece underscores how our bodies are governed by internal hormonal tides.