I've seen 3 different FS and all have been willing to do IVF with me. My BMI is around 38 (and, since it was mentioned above, my AMH is crap).

Be aware that you can also have issues with your maternity hospital when you get a BFP if your BMI is over 35. Mine had different rules for anyone with a BMI over 35 and I've heard of others turning women away.
I have heard that too, although most of the bigger places seem to be able to manage.