NK cells have nothing to do with APS. Also, after over 10 losses myself, and going to almost 12 docs in the USA and overseas, none of them really believed in the NK theory (other than Sher)..We actually saw a team in England where a study was conducted about NK cells and repeat m/c's. The study showed that even with high circulating uterine NK cells (done by biopsy), there was no evidence of a higher rate of m/c's. That said, we chose not to use any treatment for elevated blood NK cells, which most people do have and vary throughout the course of the day. That translates into, if you take them at 8am, they can be low and if you take them at 3PM on the same day, they can be elevated. Many women do use the treatments for them , just to cover themselves but several doctors told us not to and we put our trust in them. My only successful pregnancy was when I used, lovenox (three blood clotting disorders here), prednisone (10 mgs for one month prior to cycle and 10 weeks after ++), thyroid meds (thyroid meds were increased prior to cycle to speed it up TSH was 0.7 when I started the estrogen, increased after 10 days as TSH was rising with the estrogen, BA (for clotting) and of all of the drugs for the transfer ,pure estrogen (from a company in Texas formulated by a compound pharmacist in NY into supps..these are not available and have to be made), p4, estrogen patches and I think that is it.
You have to be comfortable with the entire process and what you will do when you cycle next.