It depends on how you see it.
My doctor initially told me to go for blastocyst because this would weed out the strong embryos from the weak, that I had 9 embryos which was a good number so she expected 3 - 4 to make it to blastocyst stage. She also said that blastocysts, being stronger, results in higher chances of pregnancy. I agreed and now I regret.
I had 24 eggs which became 9 viable embryos. Out of my 9 embryos, 6 were Grade 4 quality, 1 was Grade 3 and the last a Grade 2. 7 made it to become blastocysts by Day 5 but only 1 sufficiently suitable for transfer. So I transferred that good one and they observed the rest which were still growing. On day 6, the embryologist called to tell me the remaining 4 are turning dark, which is not a good sign. There were 2 which were fully developed to become blastocysts but they wanted to throw those away too because 'not growing at a pace that was quick enough' and hence, were unlikely to survive the freezing and thawing process. I was extremely upset. I had 24 freaking eggs and now I am effectively left with 1 blastocyst.
On hindsight, I should have taken a chance and transferred at Day 2 instead of Day 5. It would have been more inconvenient for me to try a few times but at least my embryos are given the natural environment to thrive and grow in. Now I will always wonder whether the lab's culture was good enough for my embryos and blastocysts. Whether my decision killed my good embryos which could possibly have made it in my womb's natural conditions.
My embryos were strong enough to become blastocysts so they were allegedly strong fighters. They were, however, slow developers. The lab could not keep them anymore because they don't have the technology to provide a suitable culture beyond Day 6 blastocysts. They also had not grown to a stage which could tolerate the technology currently used to freeze and thaw blastocysts. Had I just decided to go ahead with 2 embryos and freeze the rest of my viable embryos, I won't be left in my current predicament of having only 1 blastocyst left. If this blastie fails to stick, I am left with NOTHING.
In short, I am very upset with my own decision. The doctors and embryologists have their own interests and if theirs coincide with yours, good and fine. I accept that the doctor's advice is good if I am someone who wants a higher chance at pregnancy from this stage. However, given my desire to want this to be my very last cycle, I should have considered the tactical advantage of being able to freeze and use my embryos for future cycles.
I was also extremely put off by the embryologist, whom i think tried to shove her decision down my throat by repeatedly saying 'WE HAVE DECIDED not to freeze the blastocysts'. I was stunned and asked 'don't I have a say in this?'. She seemed taken aback by my question, stuttered a bit and finally conceded, 'yes, you do'. Despite her 'decision', I directed her to freeze the 2 fully developed blastocysts. They may not survive but I am being stubborn. I must at least try to save my blasties. I think the embryologist's approach was definitely not right in terms of respecting patient's rights and obtaining informed consent.