Paternity law is about the legal relationship between a biological father and his alleged children. A paternity suit is a legal action in which a man is determined to be the father of a child or children. Until paternity has been established by the family law court, a man has no legal rights or obligation regarding his alleged children. Paternity law is usually not a concern for married couples—if a married couple has a child, the law presumes the paternity of the father. Even if the couple marries after the child is conceived, or a man attempts to marry a woman around the time a baby is conceived, he is presumed to be the father.