First of all, I've mentioned before that I was overstimmed during my first IVF, which was likely the cause of my low egg maturity rate, and that my stim dosages were decreased this time, in an attempt to avoid overstimulation. Well, it seems to have worked! IVF #1: 21 sizeable follicles, 19 eggs retrieved, 8 mature, 5 embryos after fertilization with ICSI. IVF #2: 9 sizeable follicles, 11 eggs retrieved, 7 mature, 5 embryos after fertilization with ICSI. So you can see that the success rate at each step has been higher.
Today was the third day after egg retrieval (which by the way, was curiously more painful this time). We learned from the Embryologist that all 5 embryos are still growing, although one is slacking. A healthy embryo should be 6 or more cells by this point. Today we had a 9-cell, two 8-cells, a 7-cell, and a 5-cell. If my memory is correct, with IVF #1, we had an 8 cell, three 6-cells and a 5-cell. So the theme of higher success rates at each step of IVF #2 is continuing!
This IVF cycle has been more complicated because we want to do preimplantation genetic screening (PGS) at the day 5 stage, instead of day 3 like last time. In IVF #1, we had a single-cell biopsy done of our embryos at day 3, to test them for a severe chromosomal abnormality, and hopefully prevent another miscarriage. The results came back on day 5, and we had one competent embryo. Two tested as incompetent, and two were inconclusive. Unfortunately, the two that were inconclusive had already ceased growing on their own, or we would have given them a try.
A day 5 biopsy collects more than one cell for testing, and it takes longer to get the results. But it's also more accurate. However, it does require freezing. So our first plan for IVF #2 was to do a freeze-all cycle. But then, considering that we could easily end up with only 1 or 2 embryos to test at day 5, and that the 5-day growth process culls some of the genetically incompetent embryos anyway, we decided to have a back-up plan of preparing for an embryo transfer. In the case that we ended up with only 1 or 2 embryos at day 5, doing PGS seemed pretty pointless. But the result has been that I have had to prepare for both circumstances - a freeze-all, and a day 5 transfer. Having to explain this over and over again to confused nurses was no picnic.
Today, when the Embryologist called with our day 3 results, I was so relieved when she said we still have all five. If we had already been down to 1 or 2 poor-grade embryos, we would have gone in for a transfer today, and I am still in pain from my egg retrieval on Thursday, so I really don't feel ready to get pregnant. I was already getting worried about the very realistic possibility I would need to do a transfer on Tuesday, wondering if I would still be in pain. But, she also had some surprising news.
The Embryologist told me that they always grow a batch of mouse embryos to test the culture medium and lab environment, and that all her mouse embryos had just died. She needed to pull all embryos out of culture. In other words, they all had to be either transferred or frozen. So we froze all five of our embryos. The more accurate term would be "cryogenically preserved", but "froze" is easier to type.
Of course, the idea of something being seriously wrong in my embabies' first nursery concerns me, but I couldn't be happier with the Embryologist's response time, and her focus on saving them. The amazing part is this feels like a blessing. My body does not feel ready to become pregnant right now. This will give me a few weeks to feel completely healthy again.
So when will we get PUPO (pregnant until proven otherwise-describing my state after an embryo is transferred)? Probably anywhere from late September to late October. Vague enough for you? I'll write more about what that part will entail in a later post. For now, we have five snowflake babies resting peacefully. Please pray for them and for us!
As always, please feel free to ask any questions. This often seems like science-fiction to me, but at this point I've probably become so familiar with it, I brush over some points that need explained. No question is too simple.
