Pregnancy TrimestersAppointments and SchedulesPregnancy Trimester, FirstPregnancy Trimester, ThirdPregnancy Trimester, SecondPregnancyPregnancy ComplicationsPregnancy OutcomePregnancy, AnimalPregnancy, EctopicPregnancy Complications, CardiovascularGestational AgePregnancy RateUltrasonography, PrenatalAbortion, SpontaneousPregnancy in DiabeticsPregnancy Complications, NeoplasticPregnancy Complications, InfectiousPregnancy, MultiplePregnancy TestsPlacentaInfant, NewbornPregnancy, TubalPre-EclampsiaOutpatient Clinics, HospitalPregnancy in AdolescencePregnancy, High-RiskPregnancy ProteinsAbortion, InducedPregnancy Complications, HematologicTrophoblastsPrenatal CareFetal DeathFetal DiseasesPrenatal DiagnosisPregnancy, UnplannedPatient ComplianceMedical ReceptionistsPregnancy, UnwantedMaternal-Fetal ExchangeChorionic VilliPatient SatisfactionDeciduaFetusProspective StudiesFetal DevelopmentFetal Growth RetardationAbnormalities, Drug-InducedPregnancy, TwinBirth WeightPractice Management, MedicalPrenatal Exposure Delayed EffectsReferral and ConsultationUterusPregnancy Complications, ParasiticFamily PracticeReminder SystemsAmniotic FluidMaternal AgeEnglandTreatment RefusalAbortifacient Agents, NonsteroidalParityHypertension, Pregnancy-InducedMaternal ExposureQuestionnairesCrown-Rump LengthPregnancy, ProlongedHealth Services AccessibilityTime FactorsPremature BirthPatient Acceptance of Health CarePregnancy MaintenancePregnancy, AbdominalRetrospective StudiesCesarean SectionChorionic Gonadotropin, beta Subunit, HumanWaiting ListsEmbryo ImplantationFertilization in VitroAbortion, TherapeuticAbortion, HabitualObstetric Labor, PrematureCongenital AbnormalitiesRisk FactorsCohort StudiesEmbryo TransferDown SyndromePractice ManagementPlacentationDiabetes, GestationalAbortion, ThreatenedMisoprostolTelephoneChorionic GonadotropinAmbulatory Care FacilitiesPatient DropoutsLabor, ObstetricContinuity of Patient CareInfant, Low Birth Weight