Pregnancy TrimestersPregnancy Trimester, ThirdPregnancy Trimester, FirstPregnancyPregnancy Trimester, SecondPre-EclampsiaPregnancy ComplicationsPregnancy OutcomePregnancy, AnimalGestational AgePlacentaUltrasonography, PrenatalPregnancy Complications, CardiovascularPregnancy, EctopicAbortion, SpontaneousPregnancy in DiabeticsTrophoblastsFetal Growth RetardationPregnancy ProteinsDeciduaAmniotic FluidChorionic VilliHydatidiform MolePregnancy Complications, InfectiousPlacental CirculationInfant, NewbornUterusFetusPregnancy RatePregnancy, High-RiskMaternal-Fetal ExchangePregnancy Complications, NeoplasticPregnancy, MultipleFetal DeathPrenatal DiagnosisPregnancy TestsFetal DiseasesAbortion, HabitualChorionic Gonadotropin, beta Subunit, HumanPostpartum PeriodFetal MovementFetal DevelopmentReference ValuesPregnancy, TubalObstetric Labor, PrematurePlacentationBirth WeightAbortion, MissedHypertension, Pregnancy-InducedPregnancy in AdolescenceDiabetes, GestationalAbortion, InducedParityPremature BirthPregnancy, ProlongedInfant, Small for Gestational AgeLabor, ObstetricMaternal AgeHeart Rate, FetalChorionic GonadotropinEmbryo ImplantationAmniocentesisPlacenta DiseasesCrown-Rump LengthDown SyndromePregnancy Complications, HematologicHELLP SyndromeVascular Endothelial Growth Factor Receptor-1Umbilical ArteriesUterine ArteryFetal Membranes, Premature RuptureUltrasonography, Doppler, PulsedPregnancy, UnplannedProspective StudiesCesarean SectionParturitionAbortion, ThreatenedPrenatal CareCase-Control StudiesNeuroprostanesPregnancy, UnwantedChorioamnionitisFetal WeightProgesteroneEclampsiaAbnormalities, Drug-InducedPregnancy, TwinFetal BloodPrenatal Exposure Delayed EffectsPostpartum ThyroiditisPregnancy-Associated Plasma Protein-AFetal ResorptionUterine NeoplasmsTrophoblastic NeoplasmsPregnancy Complications, ParasiticFertilization in VitroChoriocarcinomaEmbryo TransferEmbryo Implantation, DelayedUltrasonography, Doppler