I like this thread. I'm in the same boat, needing to lose 40ish plus pounds, but wanting to try again NOW.. especially since the two year window just closed on us. I don't know what I spent the last two years doing, but it wasn't getting serious about losing weight. I'd try for a while and then give up and then try again and then give up. I think over the last two years I'd lose and gain back the same 15 pounds.
I am learning towards the "risk it" option, but that is just me. I see so many women have healthy pregnancies and they're twice my size.. it makes me so jealous. I want to be pregnant too! Anyway, it's completely your decision, of course. I had two doctors give me two different opinions. Get yourself tested for everything under then sun and then "weigh" your options. Of course, everyone says it does help to be at a healthy weight for overall pregnancy health, preeclampsia aside.
Mommy to Gracie- born at 25 weeks 03/15/11, 11 inches, 1.1lbs, and absolutely beautiful. Became my sweet angel the next day.