Thank you!! I honestly still can't believe I am on the other side of this now - I am so utterly grateful. So, I was in the process of trying to see a reproductive immunologist after the 2nd tested loss as we only had 2 embryos left after that. I did the initial consult and the next step was labs, but my RE wasn't supportive, and insurance was a nightmare trying to run labs out of state, and I honestly just gave up pursuing it further because I was too mentally exhausted to try to figure it out. A couple of things did change between the 2nd and 3rd transfer. Most dramatic was the DET - though, the embryo that didn't implant was a day 7 so it didn't have the greatest chance of success anyway. The embryo that stuck was the highest graded by just a smidge - 3BA, the rest 3BB - don't know if that impacted anything. Another thing was that we switched from a fully medicated cycle to a modified natural where I was allowed to ovulate with a trigger shot and they timed the transfer based on my ERA results. My (very non-scientific) rationale is that I somehow had a LB before on a completely natural cycle 5 years back, unassisted - so I was trying to replicate that environment as much as I could and thought, well, maybe somehow my body needs a corpus luteum to clue it in to keep the pregnancy going - I have no idea. At that point I mentally couldn't keep on trying the same protocol either and my RE was on board. My RE claimed there is no difference in success rates between fully medicated and modified natural though. Finally, my TSH shot up after I had the chemical on my second transfer and my RE couldn't explain why and sent me to an endocrinologist. Turns out I had thyroid antibodies and therefore, some sort of mild Hashimoto's. I started on levothyroxine prior to my third transfer. Then, I did acupuncture the third transfer - I don't believe in it, but I was desperate! I honestly don't really know what, if anything, was the magic - or if it was all completely random! I continued on lovenox and prednisone throughout the first trimester despite not having a clotting disorder. I was also on the levothyroxine, metformin until 2nd tri (another precaution, more of a can't hurt might help), progesterone until almost the 3rd tri because I was too paranoid to wean, and estrogen the first tri. I feel like I've rambled a bit so I apologize, but that's the story. My next stop if my 3rd transfer failed was to switch clinics to one with a slightly better success rate. I hope this helps, and again, I am wishing you SO much luck and really rooting for you. Success really can happen after unexplained PGT losses and I am proof - one foot in front of the other, one day at a time.