Estrus DetectionEstrusEstrus SynchronizationInsemination, ArtificialCortical SynchronizationProgesteroneCattlePregnancyMelengestrol AcetateProgesterone CongenersElectroencephalography Phase SynchronizationOvulationDinoprostEstrous CycleBiological ClocksOscillometryDiestrusPregnenedionesTime FactorsPeriodicityFertilityPregnadienes