Menstruation DisturbancesMenstrual CycleDysmenorrheaMenstruationFollicular PhaseLuteal PhaseCell CycleEndometriumProgesteronePremenstrual SyndromeEstradiolOvulationPregnanediolLuteinizing HormoneFollicle Stimulating HormonePremenopauseAmenorrheaFertile PeriodGonadal Steroid HormonesContraceptives, Oral