Maternal AgeGestational AgeInfant, Small for Gestational AgePregnancyInfant, NewbornBirth WeightEmbryo, MammalianInfant, PrematureEmbryo, NonmammalianPregnancy OutcomeUltrasonography, PrenatalChick EmbryoDown SyndromePremature BirthBirth OrderPregnancy, High-RiskInfant, Low Birth WeightPaternal AgePregnancy ComplicationsEmbryo ImplantationPregnancy Trimester, FirstPregnancy Trimester, SecondCrown-Rump LengthParityFetal Growth RetardationAmniocentesisPrenatal DiagnosisEmbryonic and Fetal DevelopmentFetal DeathBlastocystInfant, Premature, DiseasesFertilization in VitroCongenital AbnormalitiesFetusPregnancy Trimester, ThirdInfant MortalityEmbryonic DevelopmentObstetric Labor, PrematureFetal DevelopmentRisk FactorsAbortion, SpontaneousFetal DiseasesBirth CertificatesTwinsPregnancy, MultipleCesarean SectionInfant, Very Low Birth WeightStillbirthTrisomyDelivery, ObstetricTerm BirthAmniotic FluidProspective StudiesApgar ScoreCohort StudiesPrenatal CarePre-EclampsiaNuchal Translucency MeasurementRetrospective StudiesAneuploidyIntensive Care Units, NeonatalMothersLive BirthGene Expression Regulation, DevelopmentalPlacentaChromosome DisordersEmbryo LossPerinatal MortalityNondisjunction, GeneticFetal HeartChorionic Gonadotropin, beta Subunit, HumanChild DevelopmentFetal MacrosomiaPreimplantation DiagnosisGastroschisisPrenatal Exposure Delayed EffectsMaternal ExposurePregnancy-Associated Plasma Protein-AFetal WeightPregnancy, TwinLogistic ModelsCleavage Stage, OvumTripletsBlastomeresRetinopathy of PrematurityInfant, Newborn, DiseasesHernia, UmbilicalCase-Control StudiesReference ValuesSperm Injections, IntracytoplasmicFetal BloodRegression AnalysisRespiratory Distress Syndrome, NewbornHeart Rate, FetalFetal MortalityFetal Membranes, Premature RuptureUmbilical ArteriesOocytesHypertension, Pregnancy-InducedDiabetes, Gestational