Chorionic VilliChorionic Villi SamplingPlacentaPregnancyPrenatal DiagnosisAmniocentesisPregnancy Trimester, FirstTrophoblastsFetal DiseasesChromosome DisordersGestational AgePlacenta DiseasesPlacentationChorionFetomaternal TransfusionKaryotypingUltrasonography, PrenatalPlacenta PreviaPregnancy, TubalPlacenta AccretaAmniotic FluidAbortion, SpontaneousMethemalbuminPlacenta, RetainedTrisomyDeciduaAmnionHydatidiform MoleDown SyndromeFetusPregnancy, High-RiskMaternal AgeCordocentesisMosaicismPre-EclampsiaAneuploidyNeckChromosome AberrationsAbortion, SepticAbortion, EugenicPregnancy Trimester, ThirdPregnancy Trimester, SecondCrown-Rump LengthPregnancy Reduction, MultifetalChoriocarcinomaPregnancy, MultipleNuchal Translucency MeasurementPregnancy OutcomeIntestine, SmallAbortion, InducedJejunumGenetic CounselingIntestinal Mucosabeta-ThalassemiaLeukemia Inhibitory Factor Receptor alpha SubunitFetal DeathMicrovilliMaternal-Fetal ExchangeImmunohistochemistryPregnancy ProteinsHeterozygote DetectionBasement MembraneChromosomes, Human, Pair 18IleumFluorescent Antibody TechniqueAbnormalities, MultipleInfant, NewbornPolymerase Chain ReactionGene Expression