@TheSnufflet Hello my dear, I hope you're feeling a wee bit better today, even though I know that it is quite impossible after a total fertilisation failure. You need time to process everything and I am glad that you're taking some time away from the IVF world to heal and get back to it stronger. My first cycle was in February and my second cycle started in May/June, and to be honest, I would have started later if I could but wasn't in the right frame of mind when they phoned me to confirm my next cycle. As I said earlier, counselling and acupuncture has became my go-to treatments to get back to my normal self after all that IVF madness!
At our review appointment, the consultant told us that they can't explain why we had total fertilisation failure. In our case, the sperm was still trying to fertilise the eggs after 18 hours, but there was no sign of fertilisation in the eggs, i.e. two pronuclei. I asked the consultant why they didn't perform rescue ICSI as they do in other parts of the world, but she explained that they don't do that in our clinic. Moreover, it could have been that sperm penetrated the egg but didn't activate it, which is one of the many causes of fertilisation failure. The six eggs that were mature and were placed in the petri-dish to fertilise looked fine and my husband's sperm was also very good, so she didn't think there were issues there. She is a very experienced consultant and said that, thirty years ago, when she started working with IVF, they would simply advise the couple to have another go and, more often than not, fertilisation would happen in a subsequent cycle. Of course, we now have ICSI and she recommended its use in any further cycle. To cut the long story short, no real answers from the consultant, as you also experienced in your review appointment.
However, I had a chat with a couple of friends who are in the medical field about this, and they had different views. Our clinic recommends 2-5 days of abstinence, but 5 days might be too long and lead to normal-looking sperm, but with some DNA fragmentation. Sperm selection for IVF and even ICSI is purely based on sperm motility and morphology, so it is quite possible that the ones selected for standard IVF were quite fragmented? Many recommended a shorter abstinence, 2 days maximum. Sperm numbers were quite similar this time around regardless of the shorter abstinence period, but possibly the quality was better.
All three embryos developed well to day 3, and two got to blastocyst stage in day 5 - both top quality, so ICSI definitely helps! I went to the clinic on Sunday for my transfer and am now in the first week of my first ever 2ww through ICSI! We can't believe we actually have another blastocyst in the freezer waiting for us - I thought this was going to be another fertilisation nightmare but we were wrong and good things can happen, as I'm absolutely sure it will happen to you, too.
Continue to look after yourself and take this time to digest everything that happened - and it's a lot! IVF is a tough journey but we will go through it with hope. I wish you all the best and am sure that you'll be coming back here in a couple of months with good news!