TrophoblastsPlacentaPlacentationPregnancyChorionic VilliChoriocarcinomaPregnancy Trimester, FirstDeciduaEmbryo ImplantationPregnancy ProteinsHLA-G AntigensPre-EclampsiaPlacenta DiseasesGiant CellsBlastocystChorionMaternal-Fetal ExchangePlacental LactogenUterusEndometriumCells, CulturedChorionic GonadotropinCell DifferentiationPregnancy, AnimalUterine NeoplasmsImmunohistochemistryGestational AgePlacental CirculationPregnancy Trimester, ThirdFibroblast Growth Factor 4Hydatidiform MoleRNA, MessengerCell LineGene Expression Regulation, DevelopmentalKeratin-7Trophoblastic NeoplasmsCell MovementFetal Growth RetardationEmbryo, MammalianEmbryonic DevelopmentReverse Transcriptase Polymerase Chain ReactionPregnancy, TubalExtraembryonic MembranesTrophoblastic Tumor, Placental SiteEmbryo LossEncyclopedias as Topic