I had my eggs retrieved and ICSI performed on Tuesday 7/14/09. I had my embryo transfer on Friday 7/17/09 (a day-3 transfer). My first beta was Wednesday and was 86.5 - my second beta was this morning, still waiting for results. How do you determine how many weeks you are pregnant and your potential due date? I know it's very different than the natural way/calculation. Do you start on the day your eggs were retrieved? Thanks!