Birth RatePregnancyInfant, NewbornMothersLive BirthPrenatal Exposure Delayed EffectsSocioeconomic FactorsBirth WeightRisk FactorsPremature BirthPregnancy in AdolescencePregnancy RatePregnancy OutcomeEmbryo TransferFertilization in VitroInfant, Low Birth WeightIllegitimacyMultiple Birth OffspringReproductive Techniques, AssistedChild WelfareMaternal AgePregnancy, MultipleBirth CertificatesOvulation InductionDisabled ChildrenOocyte RetrievalChild BehaviorSperm Injections, IntracytoplasmicVital StatisticsInfertility, FemaleEmbryo ImplantationInfertilityCryopreservationReproductive Control AgentsFollicle Stimulating Hormone, HumanAbortion, SpontaneousGestational AgeUnited StatesGamete Intrafallopian TransferInfant MortalityBirth OrderSingle Embryo TransferClomipheneRetrospective StudiesPregnancy ComplicationsCesarean SectionFertility Agents, FemaleAbortion, HabitualAbortion, LegalChild RearingChild Health ServicesInsemination, Artificial, HomologousFertilityDelivery, ObstetricNational Center for Health Statistics (U.S.)Embryo Culture TechniquesPrenatal CareChild Behavior DisordersChild, InstitutionalizedPaternal AgeTwinsChild PsychologySingle ParentMinorsChild of Impaired ParentsCleavage Stage, OvumSex RatioNafarelinParentsProspective StudiesDental Care for ChildrenFetal MortalityParental NotificationChild, OrphanedTreatment OutcomeCohort StudiesAbortion, InducedOocyte DonationFetal DeathDemographyMarital StatusChild Nutrition DisordersTime FactorsParturitionChild LanguageChild Nutritional Physiological PhenomenaMenotropinsInsemination, ArtificialBirth IntervalsStillbirthChild MortalityPreimplantation DiagnosisBlastocystSeasonsAnovulationObstetric Labor, PrematureIncidenceFamily Planning PolicyImmunity, HerdSperm Retrieval