Dreams are 90-something % about our unresolved emotions from our conscious state.  They are given in symbols to help us understand at a deeper level the meanings of these dreams.  Pregnancy is the birth of new ideas.  The reason you do not see birth is the fears of stepping onward and upward into these opportunities.  And it would appear that the subconscious, at least, is trying to help you grow into acceptance of the opportunities that life is offering to your own personal growth.  Stilling the emotions and stepping up would eliminate the need for these dreams in your mind.  

There is seldom any reality to the dreams.  But fears manifest readily as symbols to help you define what you wish to do in the conscious state.