It really depends on the doctor that you speak to because many of them are different. I know certain clinics only do blasties and others prefer 2/3 day and charge extra for blasties. I think there is evidence that both can be successful. For me, I always have blasts because I have a large drop off at day 3 - that is on day 3 last cycle, for example, we went from having 19 fertilised to 5. So I figure had we put one of those other ones in - seems to me it wasnt going to make it - if that makes any sense?

But really each to their own and girls in here have had success with each option so I really dont know for sure - you just have to be comfortable with it yourself, I guess...

As for OHSS, make sure you are really resting - I mean minimum movement and drinking lots and lots of water. I had a level of 38,000 2 days before OPU and 24,000 2 days before OPU the next time and didnt get OHSS. Although I was very sore and very tired! Hang in there, rest, drink and GOOD LUCK!