The impressive nutrient profile of spinach and other cruciferous vegetables make it a great diet choice for women suffering from polycystic ovary syndrome. Spinach has high levels of calcium, magnesium, dietary fiber and vitamin D, not to mention a number of powerful antioxidants. Magnesium helps to regulate insulin sensitivity, thus preventing the development of diabetes, while calcium is linked to regulating menstruation, which can often be disrupted or stopped altogether in women suffering from this syndrome.