This article discusses the merits of single embryo transfer and why it hasn't really caught on yet. I think one of the main points is the feeling that transferring more than one embryo actually gives us a better shot at pregnancy. Aside from the font being way too small for my over-35 eyes, I thought the article was interesting.
Having been in that position, I chose to transfer 4 embryos in each of 4 cycles. In the first of those (my second cycle) I got pregnant with one baby (there was probably another that implanted, but only one made it to the sac stage) and in the last of those, I originally had 3 sacs (despite lousy quality embryos). Two survived (they are turning 11 next week). For me, it was ideal. I always wanted a lot of kids and, at that time, treatment was subsidized for just the first and second child, so getting a third one really did seem like getting another one free... I was also very lucky and carried my twins to the end of 39 weeks. Both were born weighing close to 6lbs.
Whenever people tell me how great it is to have twins, I say that there's a reason that most babies are born as singletons, but then again, it does seem kind of special to have twins & if I had to wait as long as I did to become a mom and go through so much, it is kind of nice...
If you have to choose how many embryos to transfer, how many would you choose & how would you feel if you ended up with twins or more?