Chorionic Villi SamplingChorionic VilliAmniocentesisPrenatal DiagnosisPregnancy Trimester, FirstFetal DiseasesPregnancyFetomaternal TransfusionChromosome DisordersUltrasonography, PrenatalCordocentesisAbortion, EugenicNeckPregnancy, High-RiskAbortion, SpontaneousAbortion, SepticCrown-Rump LengthKaryotypingMaternal AgeDown SyndromePregnancy Reduction, MultifetalTrisomyGestational AgeNuchal Translucency MeasurementPregnancy, MultiplePregnancy Trimester, Secondbeta-ThalassemiaChromosome AberrationsPregnancy OutcomeAneuploidyAbortion, InducedFetusTrophoblastsPlacentaGenetic CounselingInfant, NewbornPregnancy, Tubal