SanFranDreaming we did PGS as a diagnostic as much as anything. We don’t have any male factor - DH has Olympic swimmers, it’s me that’s broken.
My second cycle I got a BFP, but mc at 10w. We paid to have the tissue tested after the ERPC, and that showed that the baby was chromosomally normal - i.e. the problem was me, not the embryo. My endometrium has been a persistent issue, plus the foetal demise was so sudden, that although my thrombophilia tests had all been clear, we couldn’t rule out compromised foetal blood flow
So we knew the issue was the uterine environment. However if we put an untested embryo back, if the cycle failed or I miscarried, we wouldn’t know if we had cracked the uterine environment but the embryo was a dud - or if the embryo was normal but we hadn’t cracked the uterine environment.
So without that information, we wouldn’t know what to change the following cycle, because we wouldn’t know what was working and what wasn’t.
PGS on our 4 frosties showed ALL were abnormal. So if we had done 4 FET with those embryos, every cycle would have failed / miscarried. But we wouldn’t have known if the problem was the seed or the soil. We’d have assumed both, and then after transferring 5 embryos with no baby, we would have given up.
Our third round was much more successful. Out of 9 blasts tested, 6 were normal.
So when we did our recent FET, we knew that the seed was good by only transferring a normal embryo- so when I miscarried again, we knew that we still hadn’t cracked the uterine environment
Hence why we are currently doing several preparatory cycles to work on my lining before we have another crack at a transfer cycle. Two cycles with a copper IUD and HRT, then the plan is to do a dummy FET with endometrial biopsies to see what the lining is actually doing under the microscope, and not just what it’s showing us on ultrasound (not the Coventry uNK cells biopsy, standard biopsy for histology in the first half of the cycle, then 5 days after starting progesterone we’ll do the ERA biopsy)
PGS has been an invaluable diagnostic, otherwise we wouldn’t know what was working and what wasn’t.
It’s also let us set a sensible limit. We will call it a bust on my own body after two more transfers, as that would be a total of 4 genetically normal embryos and no baby - so it wouldn’t be a case of keep trying and hope we get a good egg, we would have to accept that my uterus is unable to sustain a pregnancy. We would therefore keep the remaining 3 frozen genetically normal blasts for transfer to a surrogate - as if my uterus isn’t up to the job, our best chance of having a baby would be to transfer into someone else’s.
We did PGS after ‘only’ one miscarriage, but without having done the genetic testing - on both the baby we lost, and the embryos we had made - we simply wouldn’t have the right information to be able to give us the best chance of success.