dont worry, you have a friend on the realism boat here.

29 negative cycles, & a positive with him - that's not just coincidence. did he tell you her age? could be i guess, but not likely. maybe you could just start out slow - dont have to jump straight in to the serious cancer drug treatment/jabs in the uterus etc. you could try the nk cells thing, see how it goes... add the other stuff in later if you have no luck? its a lot to take in atm, and im sure you have some serious dr googling to do - but at least you got some info that you didnt already have. there are options/alternatives to try, if you decide thats what you want to do.

(btw - im glad he was able to treat you for all your issues, repeated ivf failure/infertility, rather than getting hung up on the weight thing.)