I always knew all my life that I wanted children. Through circumstance, when I had DS1, I was a single mother, and as much as I enjoyed him, I always had the feeling that he would be the only child I'd have (in my mind, single men were not attracted to single mothers). Obviously, to cut a long story short, I had more children. I have a 3 year age gap between DS1 (Jan 2001) and DD (Feb 2004), a 2 year age gap between DD and DS2 (Mar 2006) and almost 2.5 years til DS3 (July 2008). He is now almost 9 months old and I am desperately trying to convince DP to have another one, but maybe that's because I'm past the #1 to #2 stage

You will know when you're ready, and if you're ready, to have another baby, when the time is right!