Hi Andrew,
I hope you don't see this as being unsupportive but to look at this from a woman's point of view-once she has a kid, her life is over-no more free time, her body gets taken over for 9 months and then when the baby leaves it, her body is fat, flabby and in a shambles-meanwhile, everyone's fussing over the baby while she basically gets very little attention, no more romantic alone time with you, no more social life, she'll have more housework to do, being stranded at home with the kid 24/7, losing her financial freedom 'cause she's gotta quit work, etc... From then on it's all about her taking care of that baby while your out doing whatever you want, when you want. You may change a diaper or two and rock it to sleep every once so often but for her it's a 24/7 job that she's basically taken for granted for and expected to take. I'm not saying you're wrong for wanting to have a baby, I think it's really sweet and very natural but I can definetly respect her point of not wanting a baby. Maybe if you can see if from another female's perspective you'd understand a little better and this understanding could leave you having a better connection with what she's going through and why she may not want to have children. By the way, did she say why or try to explain? I hope this helps a little. Best wishes for the both of you.