I had a planned C section with my first DC as he was on the large side - this was based on medical advice and as I had no expectations I just went with it. Born at approx 39 weeks of memory serves me - although it has been 12 years since!! It was a very positive experience and recovery was quick.
I had a successful vaginal birth with my second which was pretty quick. Again a very positive, albeit completely surreal experience. That was 9 years ago now.
I am now 30 weeks pregnant with my third. I am 40 yrs old and at my 20 wk scan was told I had placenta previa. I have another scan in a couple of weeks to check whether it has moved. Likelihood being it will have from what I've read. If it hasn't then of course it would be c section but if it has there would be no reason for a section.
However my mind is already telling me to have a planned c section anyway. Especially as I'm due end of Christmas week!! With our other children to take into consideration I feel this would be a better option. Am I daft for thinking this?? Is it as easy as just requesting one and having it booked in? If so when would they realistically do it - 39 weeks? Which incidentally would be 23rd Dec 
Any advice or words of wisdom would be most welcome 