CordocentesisPregnancyFetal DiseasesPrenatal DiagnosisUltrasonography, PrenatalGestational AgeFetal BloodPregnancy OutcomeFetal Growth RetardationPregnancy ComplicationsPregnancy Trimester, FirstPregnancy, AnimalPregnancy, EctopicPregnancy Trimester, SecondPregnancy Trimester, ThirdPregnancy, High-RiskPregnancy, MultiplePregnancy TestsAbortion, SpontaneousPregnancy RatePregnancy Complications, NeoplasticPregnancy, ProlongedPregnancy Complications, CardiovascularPregnancy Complications, InfectiousPregnancy TrimestersPlacentaAmniotic FluidPre-EclampsiaInfant, NewbornLabor, InducedPregnancy ProteinsPregnancy in DiabeticsFetal DeathPregnancy, TubalObstetric Labor, PrematureAbortion, InducedCesarean SectionTwinsPregnancy in AdolescenceUterusChorionic Gonadotropin, beta Subunit, Human