FetusAntibodiesAntibody SpecificityAntibodies, ViralAntibodies, BacterialAntibodies, MonoclonalAntibody FormationAntibodies, NeutralizingAntibody AffinityCampylobacter fetusFluorescent Antibody TechniquePregnancyAntibodies, Anti-IdiotypicBinding Sites, AntibodyTritrichomonas foetusHIV AntibodiesEpitopesAntibodies, ProtozoanAntibodies, NeoplasmAntibodies, AntinuclearFetal DiseasesCross ReactionsGestational AgeUltrasonography, PrenatalImmunoglobulin MAutoantibodiesAntibodies, FungalNeutralization TestsMolecular Sequence DataAntigen-Antibody ReactionsAntibodies, BispecificMice, Inbred BALB CSingle-Chain AntibodiesAntibodies, BlockingAmino Acid SequenceImmunoglobulin GAntigen-Antibody ComplexMaternal-Fetal ExchangeImmunoglobulin Fab FragmentsAntibodies, HeterophileAntibodies, CatalyticRabbitsImmunoglobulin ASheepFluorescent Antibody Technique, IndirectImmune SeraAntibodies, Monoclonal, HumanizedFetal HeartHybridomasEpitope MappingPlacentaImmunizationAntibodies, AntiphospholipidAntigensImmunoenzyme TechniquesPrenatal DiagnosisCell LineEnzyme-Linked Immunosorbent AssayAntigens, BacterialImmunohistochemistryAbortion, VeterinaryAntigens, SurfaceBlotting, WesternRecombinant ProteinsImmunization, PassiveCattleFetal Growth RetardationImmunoassayRadioimmunoassayMolecular WeightCells, CulturedPregnancy Trimester, SecondImmunoglobulin FragmentsAntigens, ViralImmunoblottingSensitivity and SpecificityElectrophoresis, Polyacrylamide GelInfant, NewbornFetal DeathB-LymphocytesHeart Rate, FetalHemagglutination TestsComplement Fixation TestsBase SequenceFetal DevelopmentTime FactorsHemagglutination Inhibition TestsEmbryonic and Fetal DevelopmentSeroepidemiologic StudiesT-LymphocytesAntibodies, Antineutrophil CytoplasmicImmunologic TechniquesImmunoglobulin Variable RegionImmunoglobulin IdiotypesImmunosorbent TechniquesAntigens, NeoplasmAmniotic FluidIsoantibodiesAntibody DiversityHaptens