What age are you now? For you personally, what is the oldest age you would consider having a baby? Consider all of the factors... current age, # of kids wanted, job, financial situation, home, retirement etc.
I'm almost 27 now. For me, the oldest I would want to be would be 40. At that point DH would be 50. Ideally I'd like to be done by 35 though. I'd like us to have some "us" time when the kids are grown and gone!