DISCLAIMER: I AM NOT A DOCTOR. MY OPINION IS NOT MEANT TO BE A SUBSTTUTE FOR PROFESSIONAL MEDICAL ADVICE!!!
Okay, with that said, I have been a Labor and Delivery Nurse for 14+ years. I work with two Peri-natologists and that means lots of "high-risk" patients. If you have never had hig blood pressure or diabetes (pre-diabetes or gestational) I would be less concerned. You are still at risk for that occuring but it's less likely. Do you have a healthy, active lifestyle that you could continue through a pregnancy? Non-smoker, non-drinker, taking folic acid? Those things play a big role. Are you physically able to keep up with a baby's/toddlers needs and activity level?
I've never heard of someone needing a cesarean based on weight alone wthout a trial of laor. And even when a trial fails there has always been other reasons why the baby could not deliver vaginally. We have a low cesarean section rate and plenty of obese an morbidly obese patients. I have noticed that women who are morbidly obese and short stature tend to have cesareans more often. Are you planning a repeat cesarean or a VBAC?
Take a look at these sites
http://www.marchofdimes.com/pregnanc...y_obesity.html
http://www.marchofdimes.com/trying_after35.html
Find a doctor you are comfortable with, who has had morbidly obese patients and that you trust fully. If you have a choice in hospitals check them out? Tours, word of mouth. Your labor and delivery staff will be one of the most important factors of a satisfactory and safe labor and delivery.
Also, we have only needed special equipment (beds, floor mounted toilets, different shower chairs, surgery table extenders) for women >350 pounds.
I'd be happy to give you my opinion on anything else you have questions about.
Good luck in your decision!