Hi Charleotte,
Just to add my thoughts - have you had blood tests to rule out issues that may be inhibiting the embies sticking? After our 5th failed transfer I had further blood tests (not normally done until 8 failed transfers), and was found to have antinuclear antibodies which prevent implantation. I went on meds (asprin and heparin) and had success. These will be posts in the LTTTC that list the blood test myself (and others) have had...if you have not already had them it may be worth asking for them just to rule it out! If you want further info and cant find the posts, pls PM me and I'll dig out the info from my IVF file!

Good luck with the lap and I really hope that it does the trick!
FG