I already have three DC and would like a fourth (and final). However, I am quite fat with a BMI of around 40 (only 5'2") and I am 37 years old.
Sooo .. Which is riskier / being fat or being 'older' 
I've had a look at the NHS choices website which paints doom and gloom for both scenarios so I can't work out which could be 'worse'?
Dc3 was 10.8lb no gestational diabetes (and I wasn't nearly as big as I am now) and born via elective cs so am probably looking at CS again.
Should I take a couple of years to lose some weight or should I keep time on my side?