why do people always feel the need to apologise for the obese? No one made them be that weight, and to be honest, it's no one else's fault but their own. I say this as someone who has been fat, and is no longer, through daily (intense) exercise and restricted eating. I also say it as a fully qualified medical professional, who has spent a lot of time working with the obese population.
Let me assure those who say 'those complications could happen to anyone' that it is multiple times more likely in someone who is obese. This includes miscarriage (spontaneous abortion), pre-eclampsia, facial and spinal deformities, gestational diabetes, prolonged labour etc etc.
Anyone who is thinking about getting pregnant should first make sure that they have optimum physical health (and a normal BMI) as is possible. I think it is apologist and frankly weak to suggest that 'accidents happen' - any woman who respects and is aware of her body should know better than that. If you are having sex and you are not using contraception, then by default you are actively trying to get pregnant.
It is selfish behaviour to ignore the risks you are putting yourself and your baby through because of your weight. Additionally there are extra stresses placed on the medical team responsible for ensuring safe delivery and a live mother and baby, which frankly could be avoided. This could just as easily apply to someone who is underweight, or who has another long-term health problem, not discriminating solely against the obese.
These are, however, (as ever) just my opinions.