Ductus ArteriosusDuctus Arteriosus, PatentFetal HeartInfant, NewbornUltrasonography, PrenatalGestational AgeInfant, PrematureFetusIndomethacinVena Cava, InferiorHeart Defects, CongenitalInfant, Premature, DiseasesPregnancyBlood Flow VelocityUltrasonography, Doppler, PulsedSeptal Occluder DevicePulmonary ArteryCardiac CatheterizationIbuprofenRete TestisUmbilical VeinsHeart MurmursEndarteritisLigationFetal DiseasesUltrasonography, DopplerEchocardiography, DopplerPulsatile FlowSheepEchocardiography, Doppler, ColorUmbilical ArteriesPregnancy Trimester, FirstFetal Growth RetardationVas DeferensProstheses and ImplantsPapio papioInfant, Very Low Birth WeightHeart Septal Defects, VentricularPulmonary CirculationNuchal Translucency MeasurementEpididymisAorta, ThoracicAortographyEmbolization, TherapeuticAortic CoarctationBalloon OcclusionAlprostadilEchocardiographyVeinsPortal SystemPlacental CirculationPersistent Fetal Circulation SyndromeAbnormalities, MultipleCardiovascular AgentsCyclooxygenase InhibitorsInfant, Extremely Low Birth WeightFetal MonitoringCardiovascular Surgical ProceduresAneurysmMonotremataPulmonary AtresiaRespiratory Distress Syndrome, NewbornAnimals, NewbornHeart Rate, FetalPregnancy Trimester, ThirdOxygenPapioEchidnaBronchopulmonary DysplasiaVascular MalformationsPregnancy Trimester, SecondHypertension, PulmonaryPregnancy OutcomeOliguriaTreatment OutcomeUltrasonography, Doppler, ColorAngiographyLower Extremity Deformities, CongenitalTricuspid Valve InsufficiencyIntensive Care Units, NeonatalPulmonary Valve StenosisCardiac Surgical ProceduresVasoconstrictionHeart SeptumPlacental InsufficiencyDinoprostoneFetofetal TransfusionUpper Extremity Deformities, CongenitalEnterocolitis, NecrotizingEisenmenger ComplexAlloysRetrospective StudiesHeart Septal Defects, AtrialNasal BoneAortaRecurrent Laryngeal Nerve InjuriesProspective StudiesRegional Blood FlowCatheterizationCrown-Rump Length