Y.,
I'm overweight now and not interested in having babies anymore, but I can't imagine being in the shape I am in and enduring the struggles of pregnancy. It would be so hard.
At least some other posters have given you good info. Though I'd try to lose as much weight as possible before getting pregnant.
There can be bad things that happen in any pregnancy, fat or not fat. Though the chances of c-section or other complications are greater with bad health. And being overweight is bad health. I'm fat, I don't care what they say about my blood pressure or blood sugars being good, I'm fat and it's bad for me and I'm trying to lose it.
I don't believe you can be fat and healhty. I wish it were easier to lose.... it's so hard.
Good luck on your decision.