New babies bring new life schedules. Before your new baby arrives home, start making changes at least a month or so in advance. Put up baby gates, slowly alter exercise routines, etc. to match what your dog's new schedule will be. When your baby comes home, be prepared with a collar and leash so that your dog can easily be controlled. Once his curiosity is satisfied, the average dog will ignore a newborn. However, for the sake of safety, even the most accepting and gentle dog should never be left alone with an infant.
For more information, please read the story How to Introduce Your Dog to Your New Baby.