Weight (BMI)

I went to visit my ob/gyn on Monday for my annual pap smear. Dr asked if I was trying to conceive and I stated since December but just has not happen yet. The Dr recommended that I wait until my BMI was under 45 to start trying to conceive. If I was to get pregnant I would have to see a specialist. Just wondering if I am the only one he needs to shed some pounds before I start trying again.