Intralipid infusion or HCG shot?


I’m just wondering if anyone has done intralipid infusion or had an HCG shot for a donor ivf cycle. I have been pregnant a few times and it has always ended in a miscarriage. The dr thinks it could be related to NK cells. Also, my dr said that sometimes the HCG shot given a week or two before transfer can help with implantation, which could be part of our problem. Has anyone done this or heard of it??? Thanks