Thanks Christine! Actually, funnily enough neither the full fresh IVF cycle (replaced 1 day 5 blast) nor the frozen embryo transfer cycle (of 2 blasts) took. I was taking a break, where I tried Metformin (for PCOS) and I managed to fall pg naturally on the cycle before I was going to start another full down-reg IVF cycle. As to why they didn't take - the first time, the blast was so good that the doc said he wished he was putting back blasts like that every day...he said it was luck of the draw that it didn't take. I had three good blasts frozen from that cycle and two were defrosted - they officially 'made the thaw' but the %age survival rate of the cells was 60% and 70% (needs to be 50% to be said to survive but the scientists want the %age to be much higher than that). The embryologist didn't leave me feeling hopeful at all about the cycle so I was not surprised when I got the BFN.

I really hope that you are one of the lucky women who get a success first go. I understand that IVF costs the earth over there!