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Abstract
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Keywords:
Adolescents, FemaleBasal Body Temperature MethodCervical Mucus MethodExaminations And DiagnosesFamily PlanningFamily Planning, Behavioral MethodsFertile PeriodLaboratory Examinations And DiagnosesLaboratory ProceduresLactationLiterature ReviewMenopauseNatural Family Planning--historyOvulation DetectionReproductionRhythm Method, CalendarSexual AbstinenceSympto-thermal MethodTheoretical EffectivenessTraining ActivitiesUse-effectiveness