My first cycle, we got 5 eggs, 4 were mature enough for ICSI, all 4 fertilized. We transferred 2 on day 3. The remaining 2 did not make it to blastocyst, and so they were not frozen. One of the embryos transferred stuck, but miscarried just before I entered 2nd trimester.
Second cycle, we got 4 eggs. All 4 were mature enough for ICSI and all 4 fertilized. We transferred 2 on day 3 and those were my twins. The remaining 2 embryos were frozen.