This is the first time I am hearing of this..and I have been around the block for years!!!!
I have to say, that it is a good way for the doctors to make some more money..and the other thought is..if it did have positive effects, you could be sure they all would be doing them prior to transfer to boost their stats.
Let's see what the other's say.
Good luck with your procedure..that for sure, will increase your chances of conceiving.