Recent studies demonstrate that most unwed fathers in urban areas are highly involved with the mother of their child before and after the child’s birth, with 80 percent involved during the mother’s pregnancy, and 50 percent living with the child’s mother at the time of the child’s birth. However, the relationship between the parents often does not last, and many fathers do not maintain contact with their children as the children grow up.

Source:

Johnson, W. (2001). Parental involvement among unwed fathers.  Children and Youth Services Review, 23(6), 513-536.