Healthy Period BundleA 2 month supply! PCOS causes irregular periods. This can look like periods that are too heavy, too light, never ending, or just completely missing! All of these period problems point to one core issue: you're not ovulating regularly. Why do we want to ovulate (even if fertility pregnancy isn't on our radar) consistently?? Right after we ovulate is the only time in our cycle we produce the crucial hormone Progesterone which keeps PMS symptoms away,