I have been to the Beers clinic and did some immunology testing and long story short I used intralipids and they did not work to bring my natural killer cell %'s down. When I did IVIg that did work to bring them down but it is very expensive. I would recommend that if you think you have immune issues that you work with a reproductive immunologist to see what your issues are. I am allergic to everything under the sun so I know my immune system could be a factor.
I am a Check chick so I have had this conversation with Dr. Check. He is not a fan of IVIg and recommends intralipids but you have to be your own advocate when it comes to immune treatment.