Birth RateLive BirthPregnancyBirth WeightPremature BirthPregnancy in AdolescencePregnancy RatePregnancy OutcomeEmbryo TransferFertilization in VitroInfant, NewbornInfant, Low Birth WeightIllegitimacyMultiple Birth OffspringReproductive Techniques, AssistedMaternal AgePregnancy, MultipleBirth CertificatesOvulation InductionOocyte RetrievalVital StatisticsSperm Injections, IntracytoplasmicInfertility, FemaleEmbryo ImplantationInfertilityCryopreservationReproductive Control AgentsFollicle Stimulating Hormone, HumanAbortion, SpontaneousGamete Intrafallopian TransferGestational AgeSingle Embryo TransferClomipheneUnited StatesCesarean SectionInfant MortalityBirth OrderAbortion, LegalFertility Agents, FemalePregnancy ComplicationsAbortion, HabitualInsemination, Artificial, HomologousFertilityDelivery, ObstetricNational Center for Health Statistics (U.S.)Embryo Culture TechniquesRetrospective StudiesPrenatal CareSingle ParentPaternal AgeTwinsCleavage Stage, OvumCohort StudiesNafarelinSex RatioFetal MortalityMinorsParental NotificationAbortion, InducedFetal DeathOocyte DonationMarital StatusMenotropinsBirth IntervalsRisk FactorsInsemination, ArtificialDemographyBlastocystParturitionParityHispanic AmericansStillbirthObstetric Labor, PrematureAnovulationPreimplantation DiagnosisAge FactorsProspective StudiesFamily Planning PolicyTreatment OutcomeLabor, InducedSperm RetrievalFallopian Tube DiseasesImmunity, HerdBirth InjuriesReproductive TechniquesTime FactorsCongenital AbnormalitiesAzoospermiaFamily Planning ServicesInfant, PrematureLogistic ModelsSeasonsAfrican AmericansData CollectionEuropean Continental Ancestry GroupSocioeconomic FactorsWisconsinIncidenceOvarian Hyperstimulation SyndromeChorionic Gonadotropin