I have seen two different FS and my BMI has been over 35 the entire time and neither has ever said anything. My BMI was 38 for our successful IVF cycle. It is currently 36. However, I don't have PCO/PCOS and my cycles were exactly the same as they were before I gained weight (32 days and ovulating each cycle). Our difficulties in conceiving are due to my endo, not my weight.

That said, I do have friends who have had difficulty due to excess weight. Sometimes it just isn't possible to induce ovulation, no matter how much medication you use. As mentioned above, even a 10% reduction in weight can have a very positive effect on fertility. I've seen it happen. I have a friend who did weeks of FSH injections and simply didn't produce a mature follicle, so her FS told her to come back after she had lost some weight. She lost some weight (with medical assistance) and they conceived without ever going back to the Dr! Twice!

I have to agree with Sushee - excess weight should be considered on a case-by-case basis. Take the time to investigate the case and try some treatments before saying you can't help someone (rather than "won't" help them).

I know how hard it can be to lose weight. I struggle with it myself. It feels like you're trying everything and giving up so much and getting nowhere. Is it something you could work on in the background while pursuing treatments with a different FS? Could you see a dietician, personal trainer or someone else who will help you?

As far as BMI and pg, I went to a large private hospital in Brisbane and the only restriction I read was that they won't let you use the baths in the birthing suite if your BMI is 35 or higher. I know there are other places that will turn you away though. Funnily enough, I lost weight while pg with DD (thanks to 24/7 nausea and an aversion to sugar in the 1st trimester), so my BMI was (just) below 35 for the 2nd and 3rd trimesters.