It's worth looking into then. I don't know if it helped me get pregnant. Over the past 18 months we've had issues with morphology, endometriosis and ovulation. When the first transfer failed my consultant seemed surprised as it was a 5aa embryo.
But maybe I did need the steroids. I would definitely look into it as there could be a link.
My oh had a similar conversation with colleague last night whose wife has had multiple implantation failures and has psoriasis.
Sorry if I sound daft, but is lack of catching colds etc a symptom of NK Cells? Just wondering as funnily enough I never get colds or illnesses either... my family were plagued with flu and Noravirus and I was fine despite living in the same house! I have high stage Endometriosis though and knew NK cells could be part of that.