Menstruation

Research and reporting on menstrual health and the menstrual cycle.

The menstrual cycle is one of the most data-rich systems in the human body — and one of the least studied. For decades, research excluded women of reproductive age to avoid "hormonal variability," leaving significant gaps in understanding how the cycle affects pain tolerance, drug metabolism, cardiovascular risk, and immune response. Maternie reports on the emerging science of menstrual health: what's known, what isn't, and what the evidence actually says about the cycle as a clinical signal.