DeciduaPregnancyTrophoblastsPlacentaExtraembryonic MembranesPregnancy Trimester, FirstPlacentationUterusChorionic VilliChorionEndometriumEmbryo ImplantationAmnionPregnancy, TubalMetrial GlandLabor, ObstetricAbortion, SpontaneousPregnancy ProteinsProlactin-Releasing HormonePregnancy Trimester, ThirdPseudopregnancyPregnancy, AnimalFetal ResorptionGestational AgeLabor OnsetImmunohistochemistryAntigens, CD56Menstrual CycleInterleukin-11 Receptor alpha SubunitRNA, MessengerVascular Endothelial Growth Factor, Endocrine-Gland-DerivedAbortion, MissedMyometriumAbortion, InducedPre-EclampsiaMaternal-Fetal ExchangeStromal CellsKiller Cells, NaturalAbortion, HabitualIn Situ HybridizationPlacental CirculationHLA-G AntigensAbortifacient Agents