CD56brightCD16− natural killer cells accumulate in the ovarian follicular fluid of patients undergoing in vitro fertilization

CD56brightCD16− natural killer (NK) cells that express CXCR3 accumulate in the follicular fluid of patients with a good response to ovarian stimulation. It is conceivable that granulosa cells of good responders that express the chemokine CXCL10 recruit these NK cells to support follicular angiogenesis.