Hey N2L, I know this a bit late.......somewhere on the literature they give you when you do a cycle (might also be on the piece of paper prior or post transfer) it actually recommends DTD the night before the embie is put in. I've done it on both occasions when I had my transfers and I got my BFP for both transfers. Could be a coincidence but you never know! Hope this helps and all the best in your next cycle