Well, our good luck streak ran out this morning. We're not below expectations, but we're meeting rather than exceeding.
Based on these percentages reported by the Reproductive Medicine Associates of Connecticut, we should have expected to have 1 embryo at the blastocyst stage after day 5 after having only 80% of eggs be mature (we had 100%) and only 80% of eggs fertilize (we had 100%). If we had roughly followed those percentages, we would have expected to have 2 or 3 following fertilization. Then, we would expect 30 to 50% to make it to the blastocyst stage, which would be 1 to 2 (2 rather than 1.5 (a) to be generous and (b) since half of an embryo isn't exactly a thing).