Embryo ResearchCloning, OrganismBirth WeightPremature BirthBirth RateInfant, Low Birth WeightInfant, NewbornPregnancyBirth OrderBirth CertificatesGestational AgeBirth IntervalsPregnancy OutcomeBirth InjuriesMultiple Birth OffspringMaternal AgeCongenital AbnormalitiesInfant MortalityDelivery, ObstetricPregnancy ComplicationsVaginal Birth after CesareanParityInfant, Small for Gestational AgeCohort StudiesAnimals, NewbornRisk FactorsHome ChildbirthMaternal ExposurePrenatal CareFetal DeathObstetric Labor, PrematurePrenatal Exposure Delayed EffectsMidwiferyMothersCesarean SectionFetal DevelopmentPerinatal CareStillbirthChild DevelopmentInfant, Premature, DiseasesPregnancy, MultipleBody HeightObstetric Labor ComplicationsApgar ScorePregnancy in AdolescenceSex Ratio