CD69 is one of theearliest particular markers of NK cell activity (27, 28).The elevated NK cell CD69 presentation is closely linkedwith higher cytotoxic activity and target cell lysis (29, 30).In the present study, the expression of CD69 on CD56+cells in the RPL group and infertile group were remarkablyhigher than the control group. The gene discussed is NCAM1; the disease is Infertility.