Me and my boyfriend have decided to seperate by two years that way one will be out of diapers when we have the next. So when this baby is about 16 months we will start trying for number 2.
the closer the better, I had mine 13,15 and 17 months apart and now 8 years later am on my next round:) I was 19 when I had my first and now I am 31. It is different the older you get so that is a big differnece on how far apart they are. THe older I get I do not see it being comfortable and they tend to lay lower also. I say you should go for it!
I think that it is all up to you... I am on my third baby now and I have two sons (oldest will be 7 next month and youngest will be 3 next month) I decided that I didn't want a house full of young kids so I figured 4 years was a good age and this one I remarried a few years ago and we had fertility problems. If it were up to us we would of had a baby last year but this one was a pleasant surprise. I would say whenever you are ready to be a mommy again go for it!