Sometimes it's not anything you're doing wrong. Often this caper is just a numbers game. Like throwing the dice and waiting for 2 sixes. Sometimes you get them first go, and sometimes it takes a lot longer than that.
Same deal here, BG. Rip snorter embies, and no luck. If they were iffy or highly fragmented etc, I'd understand, but you sort of assume if you have a number of good'uns it should happen. We had this discussion with our FS recently, and she said it's totally normal, and that perfectly good embies aren't a free ride to pregnancy, and it's nothing to do with the ability of the mother to accept the embryo. In 100 years they'll probably know the factors why, but for now we have to play the numbers game.
I love the above Slyder & Sushee. Sometimes guys & gals like us just forget that it may not be our fault after all. That no matter how much resting, meditation, positive thinking, medication etc etc you may have or take may not be the thing that brings about a pregnancy. It really is up to lady luck. Some may think this is a negative way to look at things but honestly it gives me hope and reassurance that my body or my embies are not failing us.

The best of luck to you Slyder, BG & Farmgirl! Don't be strangers =)