Repeated implantation failure

I generally do not appear to have implantation failure—they implant and then stop working.  Sigh.  But for anyone struggling with this, here is the most robust article I’ve ever read on implantation failure:

http://www.iffs-uit.com/article/S1472-6483(13)00475-6/fulltext

And here’s another article that talks about repeated implantation failure:

http://www.sciencedirect.com/science/article/pii/S1110569014200124

It suggests that “day-3 and day-5 sequential transfer” can be helpful—that is, transfer one on day 3 and then transfer another one on day 5.  I’d never even heard of that!  We’re not doing another fresh cycle, so this is just more of a “good to know” kind of thing.  Obviously putting two in would increase the chances of twins, but for people with repeated implantation failure that might not be such a concern.  The other problem with this method, of course, is that it does not leave room for genetic testing.