There are at least a dozen reasons why women may wake up with a headache, jitter with anxiety, or struggle to keep their eyes open at work, no matter how well they think they slept: menstruation, menopause, motherhood—the list truly goes on. But these symptoms, as vague as they are, could actually stem from a health condition that’s historically been deemed a “male disease”: obstructive sleep apnea, or OSA.