TwinsDiseases in TwinsTwins, MonozygoticFetusTwins, ConjoinedTwins, DizygoticTwin Studies as TopicPregnancy, TwinPregnancyCampylobacter fetusTritrichomonas foetusGestational AgeUltrasonography, PrenatalFetal DiseasesPregnancy, MultipleFetal DeathFetofetal TransfusionFetal HeartMaternal-Fetal ExchangeFetal Growth RetardationPrenatal DiagnosisPregnancy Trimester, SecondInfant, NewbornPlacentaTripletsFetal DevelopmentSheepAbortion, VeterinaryUmbilical ArteriesHeart Rate, FetalFetal WeightAmniotic FluidPregnancy Reduction, MultifetalEmbryonic and Fetal DevelopmentHydrops FetalisPregnancy Trimester, ThirdFetoscopyChorionAmniocentesisCrown-Rump LengthFetal HypoxiaTritrichomonasEnvironmentPolyhydramniosFetal BloodFetal MonitoringPregnancy, AnimalPregnancy Trimester, FirstDown SyndromePregnancy ComplicationsCongenital AbnormalitiesUmbilical CordAbnormalities, MultipleFetal MovementHeart Defects, CongenitalPregnancy OutcomeTrisomyAbortion, EugenicNuchal Translucency MeasurementGenetics, BehavioralHernia, DiaphragmaticMaternal AgeTwinning, MonozygoticBirth WeightGene-Environment InteractionUltrasonography, DopplerChromosome DisordersFetal ViabilityProtozoan Infections, AnimalCordocentesisPlacental InsufficiencyChorionic Villi SamplingBlood Transfusion, IntrauterineEmbryo TransferCesarean SectionBlood Flow VelocityDelivery, ObstetricRegistriesProtozoan InfectionsAnencephalyOligohydramniosSocial EnvironmentKaryotypingFetal ResorptionQuadrupletsAbnormalities, Drug-InducedPhenotypeTrichomonasNeckFetal DistressBiometryUterusDermatoglyphicsAbortion, TherapeuticPregnancy, High-RiskFertilization in VitroRisk FactorsRetrospective StudiesFreemartinismCattle Diseases