I have very vivid and often quite strange dreams. So much so that I started studying them several years ago out of curiosity. I am by no means an expert, but I can tell you what some of my books say. Pregnancy and giving birth in dreams usually correlates to new beginnings in some part of a persons life. Things like a new job, or starting your own business, perhaps a graduation and moving on to successes after schooling, even a move, anything that could be new. Are you starting or thinking about making a major change in your life? Star-Trek is about life in and exploration of the future, again major changes for your future. 3 men...well, that's more difficult, were they strangers or people familiar to you? If they were men you know, look at the quality's that you think of first when you think of each man and compare that to the rest, if they were unfamiliar consider the qualities of who they were in your dream. Perhaps it is those qualities that you are looking to gain or need for your success, or if you know the men they may play some type of role in a future change.
If I were a psychic, and I'm not, I would interpret this to mean that you are perhaps considering a major move, or starting a business and there are 3 men that you need to help you to make this happen.