In your husbands dream, you represent a commitment between his thought and action. You are the active, make things happen, part. Pregnancy symbolizes development of new ideas or behavior. The babies, are the new ideas or behaviors. Since you all were 'trying' before, this shows that your husband has been stuck in a creative block. After a period of time, and better understanding, the fruit of his creative process finally break free. Of course, once the new ideas and behaviors begin, the need for the creative commitment action is no longer needed so it 'leaves'. We all use different parts of our personalities as needed, then put them away til next time. Ask your husband to look over his life and see where he has been trying to come up with ideas or answers to a project/problem. See how his work has paid off with all the new ideas. Hope this helps. God bless.