biological father/mother/parent

everybody has biological parents, although not everyone lives with them. Biological parents are also called birth parents; they are never called "real parents." "Mother" and "father" are the terms for the people who raise and nurture a child they have adopted. Describing birth parents as "real" implies that adoptive relationships are artificial, tentative, less important, and less enduring. See also adoption language, "real" father/mother/parent.