Well, dH and I were talking about possible future kids before we were engaged - I was just telling someone around here about his "You don't want 9 kids, do you?" conversation (I have 8 siblings, it's a valid question!) that we had after dating for 8 months or so.
When we got engaged, we talked about kids again - more the dreaming kind of talking.
Up to about... 2 months before the wedding I thought I wanted to wait until we'd been married for 5 years or something before we started trying. But something happened, I'm not sure what, maybe I was talking to my best friend and remembering how sweet dH was with her son (under a year old at the time), or I was talking to my other best friend who was newly pregnant with her second child... Anyway, I knew we'd be talking babies soon after the wedding!
So I brought up the "when can we try" subject a few times...
Originally dH still wanted to wait till next year at least, but then the pill was making me sick and we were planning to start trying in January anyway, so we decided to toss the pill early!
SO, currently we're on cycle one, in two days we'll be BDing in earnest and dH isn't gonna know what hit him