Hi Bec,
DH were also told when we started IVF we would get pg...but after two stim cycles and 4 transfers, I knew something was not right. We started IVF because of poor sperm, and I was like you, I'd had very few tests as it was male factor infertility.

Anyway, I was sure something was not right - reading the stats I was convinced that after what we had done we should have got at least a BFP - even if we then went on to lose it - but nothing. So based on some info from BB, I asked for more tests...the ones that BW mentioned. And despite the odds, I came back positive for ANA - antinuclear antibodies (test is positive in only 2% of the population which is why they dont automatically test for it). I was refered to another specialist who put me on 100mg of asprin and 2 x .2ml 5000u heparin injections from transfer, as treatment for antiphospholipid syndrome (APLS) (this causes my body to attack the embies - we never had a hope of falling pg without this medication). We have just got a BFP on this FET now that we are on this protocol! We still have a long way to go, but this is the furtherest we have got so far.

I guess I'm just trying to illistrate that even a FS does not have perfect knowlege and if you are in doubt ask for more tests - it would have been another 4 failed transfers before they would have done the extra BTs for me had I not asked for them to be done sooner. Just because you have MFI, does not mean there are not other underlying issues affecting the ability of your embies to implant. Keep asking questions and push to have tests done.

Good luck
FG