Hi Lovebell, Sorry to hear your news. But Im glad u have pick up the pieces and start planning for FET. Like what Ron said, its only God knows the reasons. Doctors can only guess.
My first IVF also a failure, got positive first but turn out to be blighted ovum. The doctor cannot explain clearly why, he only guess that it may due to lack of chormosome.
My 2nd attempt was 6 months later and Im not using FET because I knew theres something wrong with my embryos. I went for another fresh cycyle. My preparation will be exercise, eat helathily, eat multivitamins, accupuncture, and during my 2ww I drank Ensure Milk (recommended by fellow IVF) without fail. And I succeed, I gave birth to a boy.
2 years later after giving birth I try another one and this time FET as I still have 2 frozen embies left from my 2nd cycle. Same preparation except accupuncture. I got pregnant but have to abort it due to baby development. I think its because I sometimes forget to eat my folic acid (due to my severe MS) So dun forget to eat folic acid its important.
This is my 3rd cycle after 6 months break. I went back to accupuncture and this time I eat 2 folic acid per day just for precaution. And still drinking my Ensure Milk. Im currently in 2ww.
So if you want to start FET, you better Tiao Yang your body and mind. Once you feel you are fit, you can start the process again. So dun give up