What are uterine natural killer cells?

NK cells in uterus. These are nk cells of the cd56 subset that have lower cytotoxic (cell killing) ability than the peripheral or regular cd56 positive nk cells. They have a different receptor profile and make up 70 % of the lymphocytes in the uterus in early pregnancy. It is important that the mother's immune system is suppressed for successful pregnancy, and so it is believed that these cells are crucial to this.