Live BirthMortalityBirth RateBirth WeightPregnancyInfant MortalityInfant, NewbornPremature BirthInfant, Low Birth WeightPregnancy OutcomeHospital MortalityBirth CertificatesMaternal MortalityMaternal AgeCause of DeathCohort StudiesRetrospective StudiesFertilization in VitroFetal DeathPregnancy RateChild MortalityBirth OrderGestational AgeCongenital AbnormalitiesPregnancy ComplicationsReproductive Techniques, AssistedEmbryo TransferProspective StudiesFetal MortalityPerinatal MortalityStillbirthUnited StatesTime FactorsRisk FactorsIncidenceAbortion, SpontaneousInfertilityFollow-Up StudiesMultiple Birth OffspringTreatment OutcomeAge FactorsParityDelivery, ObstetricInfertility, FemaleSingle Embryo TransferBirth IntervalsRegistriesPrenatal CareVital StatisticsPregnancy, MultipleOvulation InductionProportional Hazards ModelsRisk AssessmentPerinatal CareAbortion, HabitualDeath CertificatesOocyte RetrievalSurvival AnalysisSurvival RateLogistic ModelsBirth InjuriesCryopreservationAbortion, InducedSperm Injections, IntracytoplasmicAbortion, LegalPopulation SurveillanceSex RatioPrognosisAge DistributionSex FactorsPrevalenceAsphyxia NeonatorumOdds RatioRiskEnglandCesarean SectionHome ChildbirthMaternal Health ServicesCardiovascular DiseasesMultivariate AnalysisSex DistributionObstetric Labor ComplicationsMorbidityRegression AnalysisMortality, PrematureInfant, Newborn, DiseasesInfant, Small for Gestational AgeEmbryo ImplantationEuropean Continental Ancestry GroupPoisson DistributionPrenatal DiagnosisClomipheneMaternal ExposureLife ExpectancyWalesInfant, Premature, DiseasesBrazilPregnancy in AdolescencePredictive Value of TestsMothers