Unmarried men usually have a more difficult time making decisions for their child before and after they are born. This is because the woman carrying the child has certain rights to her body and her privacy. Sometimes this can make it difficult for unmarried fathers, or soon to be fathers, to feel like they are a part of the child's life and are able to make decisions for that child. However, all is not lost; there are a few options for fathers' seeking rights of their unborn child.
The first step in the process is to understand what rights are inherent to the expecting mother and what rights you have as a father in this situation. When it comes to medical decisions for mom and baby, the father has little say. This is due to the fact that the child is unborn and the woman is given all decision making power about healthcare, medical testing and even adoption. It is best to try and communicate with the expecting mother instead of trying to fight with her on every point. This will likely and hopefully get you further to your goals, in that respect.