Despite the sexist jokes, the menstrual cycle doesn’t cause significant changes in mood or behavior for most people. But a small percentage do suffer severe premenstrual symptoms, or premenstrual dysphoric disorder (PMDD). Tory Eisenlohr-Moul, PhD, of the University of Illinois Chicago, talks about how hormones and the menstrual cycle interact with mental health, why premenstrual symptoms are not caused by a “hormone imbalance,” and what treatments are available for severe premenstrual symptoms. For transcripts, links and more information, please visit the Speaking of Psychology Homepage.