Birth RateLive BirthPregnancyBirth WeightPremature BirthPregnancy in AdolescencePregnancy RatePregnancy OutcomeEmbryo TransferFertilization in VitroIllegitimacyInfant, NewbornInfant, Low Birth WeightMultiple Birth OffspringReproductive Techniques, AssistedMaternal AgePregnancy, MultipleBirth CertificatesOvulation InductionOocyte RetrievalVital StatisticsSperm Injections, IntracytoplasmicInfertility, FemaleEmbryo ImplantationInfertilityCryopreservationReproductive Control AgentsFollicle Stimulating Hormone, HumanAbortion, SpontaneousGamete Intrafallopian TransferGestational AgeSingle Embryo TransferClomipheneInfant MortalityBirth OrderCesarean SectionAbortion, LegalFertility Agents, FemaleAbortion, HabitualPregnancy ComplicationsFertilityUnited StatesInsemination, Artificial, HomologousDelivery, ObstetricNational Center for Health Statistics (U.S.)Embryo Culture TechniquesSingle ParentPrenatal CarePaternal AgeCohort StudiesTwinsRetrospective StudiesCleavage Stage, OvumSex RatioNafarelinFetal MortalityParental NotificationMinorsAbortion, InducedFetal DeathOocyte DonationMarital StatusMenotropinsBirth IntervalsAge FactorsDemographyInsemination, ArtificialBlastocystStillbirthParturitionFamily Planning PolicyTime FactorsRisk FactorsParityAnovulationPreimplantation DiagnosisObstetric Labor, PrematureHispanic AmericansImmunity, HerdSperm RetrievalFallopian Tube DiseasesLabor, InducedProspective StudiesBirth InjuriesReproductive TechniquesTreatment OutcomeSeasonsAzoospermiaCongenital AbnormalitiesPopulation DynamicsFamily Planning ServicesReproductionEuropean Continental Ancestry GroupIncidenceInfant, PrematureOvarian Hyperstimulation SyndromeAfrican AmericansSocioeconomic FactorsChorionic GonadotropinAging