Hello, sorry to hear about the unsuccessful cycles.
Issues with IVF not working can either be down to the embryo or the endometrium. In most cases the issue is with the embryo. I was I guess lucky in a way, I have never had BFP either and my embryos looked great, so it's quite clear that the issue for me is with the endometrium. But others may well have issues with the endometrium alongside issues with the embryo, and targeting just the embryo may not solve the problem.
Firstly in relation to the embryo:
From your story it sounds like you are getting good amounts of eggs, good rates of fertilization and then quite a high drop off before day 3, which could well be due to egg quality. There are a few people on here who have done well with natural modified IVF, which you might want to explore. Have you had any tests to look into endometriosis, like a laparoscopy as this can cause issues with egg quality. It sounds like you're doing the main things they advise for egg quality. The book it starts with an egg is often recommended on this subject.
You've also mentioned sperm tests as a potential avenue to explore. Is your DH living a healthy life or are there things he could improve on? My understanding is that if there are issues with fragmentation then a lot comes down to a healthy lifestyle: healthy diet, low alcohol intake, not smoking, avoiding heat around the genitals and taking vitamin C. If DNA fragmentation picked up an issue then what would be the solution, this might be a good way to assess whether this will help. Also, remember it take about 3 months to notice any improvement when it comes to lifestyle changes with sperm.
Now the endometrium:
Issues here could be to due to issues with receptivity: there is a test called the ERA but this is only really helpful for determining if the transfer of a frozen embryo needs to happen at a different time than the standard protocol. I note you've just had fresh cycles so far.
The microflora also needs to be right, there is a test called the EMMA ALICE, usually done at the same time as an ERA. In my case I was found to have 0.00% good bacteria which had to be treated. Can you explore this?
Structural issues affecting implantation can also be an issue, I note that you've had a normal HSG so it's unlikely you need to look into this further.
Then there's the immune stuff, the evidence base is pretty patchy in relation to this. I'm on the waiting list to see Prof Brosens, my understanding is that if you are found to have very high NK cells then you can try steroids and intralipids. There is no evidence for this stuff at the moment, but I think we often reach a time where we've tried the evidence based stuff.
In conclusion my advice would me
- Have a read of it starts with an egg to make sure you're doing all the recommended stuff.
- Make sure your partner is doing all the advise stuff too
- Ask your specialist if investigations for endometriosis should be explored.
- Ask about/ do some research on natural modified IVF.
- Consider the ERA EMMA ALICE.
- By all means do the NK stuff, I'm planning on doing it as I've done everything else, but I would also consider all these other things.