Thrombocytopenia, Neonatal AlloimmuneAntigens, Human PlateletThrombocytopeniaIsoantibodiesHLA-DRB3 ChainsIsoantigensPlatelet TransfusionPlatelet CountPurpura, ThrombocytopenicMaternal-Fetal ExchangeInfant, Newborn, DiseasesIntegrin alpha2Integrin beta3Blood PlateletsInfant, NewbornPlatelet Membrane GlycoproteinsPregnancyPurpura, Thrombocytopenic, IdiopathicGraft RejectionTransplantation, HomologousMegakaryocytesThrombopoietinImmunoglobulins, IntravenousPlatelet Factor 4Blood Transfusion, IntrauterineHeart TransplantationTransplantation ToleranceSkin TransplantationReceptors, ThrombopoietinHeparinTransplantation ImmunologySplenectomyGraft SurvivalErythroblastosis, FetalPhlebovirusLeukopeniaThrombopoiesisDisseminated Intravascular CoagulationPregnancy Complications, HematologicHistocompatibility, Maternal-Fetal