title: Immunosuppressive factor (or factors) produced by human embryos in vitro.
mesh_terms: D010064:Embryo Implantation; D004622:Embryo, Mammalian / Q000276:immunology / Q000378:metabolism*; D005260:Female; D006801:Humans; D007108:Immune Tolerance; D066298:In Vitro Techniques; D011247:Pregnancy