I'm 33, husband is 35, we've tried a few IUIs before moving to IVF. Retrieval is done and we have 5 frozen embryos. Scheduled for transfer in April and ended up being cancelled due to fluid. In a transfer cycle now with a new protocol and they just again found fluid in my uterine lining. If it doesn't correct itself I'm told our transfer will be cancelled again. Anyone experience this? Anyone get to the root cause of it or try a protocol that worked for getting to transfer?