It could mean many things. Alot of people believe dreams reflect emotions, conflicts, desires, etc. that you are experiencing subconsciously. This could mean that you are ready to settle down and have a family. It could also mean the opposite, but since your dream was depicting motherhood positively, its most likely the first.
This doesn't necessarily mean that it's going to happen. Think about what is more important to you and what makes you feel more fulfilled. If in the end you do want to have a baby, remember that your right in the sense that children mean you can't be out partying every night and sleeping in all day. Neither choices are necessarily bad, but think about your preferences and what you'll have to take on or give up depending on your decision.