given the choice, i would've done 3 or 5, but neither was an option for me. i had to choose between 2 or 24, and initially chose 24 because i wanted peace of mind. after reading more about it, i realized that i hadn't known enough about it to make an informed choice. i think the technology was too new, and i was afraid of the false positives... i was worried that in the end, we may not have any embryos left to put back! i ended up switching to 2.