Pregnancy dreams are actually about starting a new phase in your life, a change, a new beginning.
Dreams are always about "the self", never about the people in the dream.
The other people in our dream are there because there is something about them that is either the same as us, or we want to change in ourselves, or that we want to emulate.
Pregnancy dreams are a good thing when people are telling you that you need to let go and make some changes. It's your subconcious telling you the same thing.