Hi can anyone out there tell me at what stage does your belly start to show

It depends for every woman, depending on how long your abs will hold out. I'm 21 weeks and outwardly still just look fat. I'm on a birthclub April 2007 forum where everyone updates their belly pictures every month and it ranges from still looking very thin with a little pudge to looking as if they may have twins in there when they definitely do not .

It generally takes longer to show if you're a first time mom.

That varies greatly depending on your body type and weight gain. Some as early as six weeks if you're very thin or it could be much, much later if you are slightly overweight.