To dream that you have a newborn means that you have new ideas which you wish to make come true. If you are expecting the baby, it is very normal and common dream for pregnant women. The dream about newborn could also suggest to look after yourself more than you do at the moment. In some dreams the baby is the reflection of the people in your waking life that are being taken care of by you. If you do not have a baby, but you already planning to have one or wish to have one, then such dream is simply a reflection of your desires and wishes.
Read more about dreaming of Newborn in other dream meanings interpretations.