Prenatal DiagnosisFetusMaternal Serum Screening TestsHemoglobinopathiesPregnancyDown SyndromeAneuploidyPlasmaDNAPlacentaFetal DiseasesTrisomySequence Analysis, DNAChromosomes, Human, Pair 18Polymerase Chain ReactionUltrasonography, PrenatalGenetic TestingChromosomes, Human, Pair 21Chorionic Villi SamplingPrenatal Exposure Delayed EffectsChromosomes, Human, Pair 13Prenatal CareAmniocentesisAbortion, EugenicHeterozygote DetectionGenetic CounselingAbortion, TherapeuticInfant, NewbornAmniotic FluidDNA MethylationGestational AgePregnancy Trimester, SecondAbnormalities, MultipleAbortion, InducedPolymorphism, Single NucleotideSensitivity and SpecificityChromosome DisordersPregnancy OutcomeThalassemiaCordocentesisPregnancy Trimester, FirstHydrops FetalisKaryotypingFetal DeathSex Chromosome DisordersHeart Defects, CongenitalPolyhydramniosCongenital AbnormalitiesPedigreeRetrospective StudiesPregnancy Trimester, ThirdUltrasonography, Doppler, ColorPreimplantation DiagnosisMagnetic Resonance ImagingSex Determination AnalysisEctromeliaNoninvasive Ventilationbeta-ThalassemiaHernia, UmbilicalSyndrome