ZidovudinePregnancyPregnancy OutcomePregnancy ComplicationsPregnancy, AnimalAnti-HIV AgentsDidanosinePregnancy, EctopicLamivudineStavudinePregnancy Complications, InfectiousReverse Transcriptase InhibitorsPregnancy Trimester, FirstHIV InfectionsPregnancy Trimester, ThirdZalcitabinePregnancy RateInfectious Disease Transmission, VerticalPregnancy Complications, CardiovascularPregnancy TrimestersPregnancy TestsHIV-1NevirapinePregnancy, MultipleDideoxynucleotidesDideoxynucleosidesPregnancy in DiabeticsAIDS-Related ComplexAcquired Immunodeficiency SyndromePregnancy, TubalPregnancy Trimester, SecondDrug Therapy, CombinationPregnancy Complications, NeoplasticHIV Reverse TranscriptasePregnancy in AdolescenceInfant, NewbornAbortion, SpontaneousIndinavirCD4 Lymphocyte CountPregnancy ProteinsGestational AgePregnancy, UnplannedPregnancy, High-RiskPregnancy, UnwantedPregnancy Complications, HematologicHIV Core Protein p24Maternal-Fetal ExchangePrenatal CarePregnancy, ProlongedPre-EclampsiaPregnancy, TwinBenzoxazinesDrug Resistance, ViralPlacentaThymine NucleotidesFetal DeathViral LoadAbortion, InducedPregnancy, AbdominalUterusPrenatal Exposure Delayed EffectsRNA, ViralPregnancy Complications, ParasiticPregnancy MaintenanceAntiviral AgentsUltrasonography, PrenatalEmbryo ImplantationOrganophosphonatesAntiretroviral Therapy, Highly ActiveDrug InteractionsOxazinesHIV Protease InhibitorsEmbryo TransferFertilization in VitroCesarean SectionBotswanaDrug Resistance, Multiple, ViralLabor, ObstetricHIVParityDrug Resistance, MicrobialDouble-Blind MethodBirth WeightAmniotic FluidProspective StudiesNelfinavirAnti-Retroviral AgentsTime FactorsPregnancy Reduction, MultifetalAdenineDelivery, ObstetricRetrospective StudiesMaternal AgeHypertension, Pregnancy-InducedCohort StudiesLopinavirFetal Growth RetardationProgesteroneRisk FactorsHIV Seropositivity