Julie, I've been watching your thread here because I may be in a similar position as you. I've now had 3 failed IVF attempts and have only ONE 5-day embie frozen... I'm about to turn 44 and not sure if I will attempt any additional fresh IVF cycles. Not sure if what my chances off success in doing a FET with only the one...?
I have a 3 yr old DD from a natural pregnancy following two years of trying and 4 m/c's (2 blighted ovums, 2 chem pgs) just before we were about to start doing all the testing in preparation for IVF. I was already in my late 30's and got pg just after my 40th bday...
Good luck in whatever you decide. Good thoughts and

for you!