The thing is, i get the comments from well meaning people that i can only have as many children as i want and cope because i am young and that if i were their age (they stopped at two) I wouldnt have the energy. Now, i find it a strange statement as i am tired and rundown, but maybe I am just not as tired or run down lol?!
I think people often say age, and tired rundown etc is reason for stopping as is like it is the 'acceptable' answer or one that is less likely to be questioned. I had mine at 32 and 34 no real difference between pregnancies and neither were hard. Age made no difference at all in not wanting anymore, or the thought of tiredness etc, I just don't want anymore and knew that before number two was born. But sometimes people don't seem to believe that answer, and the 'too old' answer is more easily accepted. I used to think that money (housing) comes into the decision, and if had endless money then would want more children but now I think that for me I still wouldn't want more. Sometimes the only thing that people take as a real indication you don't want anymore is if they know DH has had the snip.

So you probably are as tired and rundown, but if there is that inkling of desire for another will make it seem less.