I was over 200 lbs with three of my children, they were all healthy full term babies. I had no trouble getting pregnant, the last 3 were right after another, lol.
BUT, my first two pregnancies were so much eaiser! Being pregnant is hard enough, but add the weight and ugg. You can do it, of course and I would go through it all over again. But if I had lost even 20lbs before hand, that would have made a huge difference. By my 5th child end of pregnancy weight was 290. You allso don't know how much your body will put on during your pregnancy... Some would say you are in control of that, to a point that is true, the rest is all genetics... Every pregnancy I gained at least 50lbs, and some were in the 70's. Yeah you loose at least 20lbs right after having a baby but the rest stays on you.
Everybody is different, for that matter every pregnancy is different! Your ability to get pregnant will be different from me or anyone else, also your pregnancy and how much you gain with it. Will your child be healthy because mine were? It's all anyones guess...
The only thing I think we all can say is, it's best to loose some weight before hand. For your comfort and health, if possible. Good luck!!!!!! Being a mom is great, I wish you much sucsess!!!