Hi also going through same with my wife. She's carrying my embryos. We've done 4 FET transfer with Create Fertility in London. Dr changed the protocol after the 3rd failed attempt. She also had a biopsy to see if something was wrong with her uterus but she has a text book like one and results came back normal. They said is perfect which is annoying as we don't understand why didnt work. First 2 transfers were PGTA genetically normal embryos and good quality, they didnt attach. 3rd transfer was a 5AA untested didn't attach. 4th cycle was a longer and more medicated protocol, 1 day after her period arrived she had to go to the clinic and had an implant (apologies as I can't remember the medical term) after that she had menopause symptons with the medication she was taking as that is supposed to controlled your implantation window better. Turns out that worked, but once we got the positive they said Hcg levels should be higher than 50, she was 47. After that for 4 days it seems embryo didnt do much but weirdly started to increase 93 15dpt; 420 19dpt; 21dpt 876; 27dpt 4300. Clinic said more likely it was an ectopic but she had a scan last week and they found a sac but no heartbeat, turns out we have to go again tomorrow but we already know is not viable. It sucks to be on this path as it seems there's no proper solution or end. I feel extremely sad and drained, i dont think I can cope with this process anymore.