Menstrual CyclePregnanediolCell CycleFollicular PhaseLuteal PhaseEstrous CycleProgesteroneEstrusOvulation DetectionReproductive Physiological PhenomenaOvaryCallitrichinaeCallimicoOvulationBeluga WhaleEstradiolCallithrix20-alpha-DihydroprogesteroneElephantsEstronePostpartum PeriodLuteinizing HormonePerissodactylaPremenstrual SyndromePregnancy, AnimalAnestrusOvarian FollicleReproductionEstrogensGonadal Steroid HormonesSheepCorpus LuteumCell Cycle ProteinsFertile PeriodProgestinsPregnancyS PhaseG1 PhaseFallopian TubesTime FactorsFollicle Stimulating HormoneG2 PhaseInterphaseUterusMitosisSeasonsCell DivisionOvariectomyFlow CytometryMetestrusOvulation InductionDNA DamageSexual Behavior, AnimalApoptosisCattleCell Line, TumorCell ProliferationMenstruationAltitudeCell LineBromodeoxyuridineCyclinsAphidicolinContraceptives, OralDNACell SurvivalCitric Acid CycleEndometriumCyclin-Dependent KinasesCell NucleusPropidiumPhosphorylationHistonesDNA ReplicationHeLa CellsHL-60 CellsTumor Cells, CulturedPremenopauseSex CharacteristicsMitoxantroneAnaerobic ThresholdAtaxia Telangiectasia Mutated ProteinsProtein-Serine-Threonine KinasesCDC2 Protein KinaseDNA-Binding ProteinsKineticsCyclin BHydroxyureaRetinoblastoma ProteinTopoisomerase II InhibitorsMicroscopy, FluorescenceCells, CulturedHormonesAntineoplastic AgentsDose-Response Relationship, RadiationCyclin D1Cell Cycle CheckpointsAntineoplastic Agents, PhytogenicModels, BiologicalImmunohistochemistry