OrganismsDiseasesChemicals and DrugsAnalytical, Diagnostic and Therapeutic Techniques and EquipmentPsychiatry and PsychologyPhenomena and ProcessesDisciplines and OccupationsAnthropology, Education, Sociology and Social PhenomenaTechnology, Industry, AgricultureHumanitiesInformation ScienceNamed GroupsHealth CareGeographicals
Placebo EffectDouble-Blind MethodContraceptives, OralContraceptives, PostcoitalContraceptives, Oral, CombinedContraceptives, Oral, HormonalCross-Over StudiesTreatment OutcomeContraception, PostcoitalContraceptive Agents, FemaleContraception BehaviorContraceptionEthinyl EstradiolMedication AdherenceDesogestrelAdministration, OralDrug PackagingDrugs, Chinese HerbalContraceptive Devices, FemaleContraceptives, Oral, SyntheticPatient ComplianceDrug Therapy, CombinationTabletsContraceptive AgentsContraceptive DevicesDrug Administration ScheduleRandomized Controlled Trials as TopicClinical Trials as TopicNorpregnenesDose-Response Relationship, DrugTime FactorsSingle-Blind MethodNorgestrelMenstruationDrug CombinationsIntrauterine DevicesProgestinsFamily Planning ServicesDelayed-Action PreparationsMedicine, Chinese TraditionalFollow-Up StudiesProspective StudiesContraceptive Agents, MaleNorethindroneAnti-Inflammatory Agents, Non-SteroidalTransdermal PatchBlood PressurePhytotherapyPainEthinyl Estradiol-Norgestrel CombinationPain MeasurementPharmacists' AidesPilot ProjectsMedroxyprogesterone AcetateCapsulesAnalysis of VarianceQuestionnairesPregnancyHealth Knowledge, Attitudes, PracticeAppetite DepressantsAdministration, InhalationRandom AllocationSeverity of Illness IndexBronchodilator AgentsAntihypertensive AgentsNonprescription DrugsDeceptionCyproterone AcetateAnalgesics, Non-NarcoticCreosoteAntidepressive Agents, Second-GenerationSerotonin Uptake InhibitorsHIV InfectionsQiRecurrenceDysmenorrheaAdministration, TopicalAspirinPlant PreparationsAmitriptylineHeart RateAcupuncture AnalgesiaDrug InteractionsAlbuterolAdministration, CutaneousElectrical Equipment and SuppliesVitaminsPlacebosCitrus sinensisGastrointestinal AgentsResearch DesignQuality of LifePregnancy, UnwantedPregnancy, UnplannedInfusions, IntravenousRisk FactorsMetforminAnti-Obesity AgentsMenstrual CycleAnalgesics, Opioid