The decidua is the place where the fertilized egg is implanted and where the
immunocompetent cells of the mother come into direct contact with genetically disparate
cells of the conceptus. Although the T cells in the decidua are exposed to fetal antigens, the
fetus is not rejected by maternal immunocompetent cells. In the present study, we examined
surface markers to determine whether the T cells in the human decidua are naive T cells
without or memory T cells with a history of antigen stimulation. Although few T cells were …