Did you know that one of the most important organs shaping lifelong health is only temporary? In this episode of Foodie Pharmacology, I sit down with developmental biologist Dr. Cheryl Rosenfeld to explore the fascinating science of the placenta and its role as the communication hub between mother and developing baby. We discuss the emerging concept of the placenta-brain axis and discuss how maternal diet, the gut microbiome, environmental exposures, and even tiny molecular signals can influence fetal development long before birth. From serotonin and the microbiome to probiotics, inflammation, and the hidden impacts of modern life, this conversation reveals how the earliest environment we experience may shape health outcomes for years to come.