1. Has anyone gone straight from a failed FET cycle into another FET cycle? I'm at Shady Grove so I go on birth control pills before the cycles, so I'm guessing I'd be ok to stop my medicines when the beta is negative, and as soon as my period comes go right on bcp? Has anyone been told anything different from their RE?
2. Does anyone know why some places use PIO for FET cycles instead of Endometrin? For my IVF I used endometrin (it was successful but I miscarried). For my FET, they started me on PIO but I had an allergic reaction and was changed to Endometrin. The next time I'd obviously start with Endometrin but it makes me nervous of why they don't USUALLY use it for FET cycles?
Thanks girls
Our Novel of TTC:
*Male Factor (low count and low motility), High Prolactin, and Polycystic Ovaries (March 2013)*Recurrent Miscarriage testing also revealed high anti-phospholipids & single MTHFR mutation. (Feb 2014)
Our healthy baby girl was born 03/10/15 thanks to daily Lovenox injections and baby aspirin. There are no words for how grateful I am for our rainbow baby. 
Re: Fet Questions
I think it depends on your RE. Ours has us take a cycle off inbetween. I've heard of many ladies here doing back to back cycles though.
GL!
It's twin girls!! Born on 11-2-14!
*IVF (07/2013): BFP-Natural Miscarriage @ 5 weeks*
*FET #1 (10/2013): BFN
*FET #2 (12/2013)- BFP-Missed Miscarriage at 8 weeks
*Chromosomes and Karotyping tests were both normal.We lost a healthy baby boy
*FET #3 (04/2014) was cancelled after finding Chronic Endometritis