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Biological Father from WikiPedia:

A father is defined as a male parent of any type of offspring. The adjective "paternal" refers to father, parallel to "maternal" for mother.

The Father-child relationship is the defining factor of the fatherhood role. The majority of Fathers are naturally protective and supportive responsible parents who are able to engender a number of significant benefits for themselves, their communities, and most importantly, their children. Involved fathers offer developmentally specific provisions to their sons and daughters throughout the life cycle and are impacted themselves by their doing so. Active father figures have a key role to play in reducing behavior problems in boys and psychological problems in young women. For example, children who experience significant father involvement tend to exhibit higher scores on assessments of cognitive development, enhanced social skills and fewer behavior problems. An increased amount of father-child involvement has also proven to increase a child's social stability, educational achievement, and even their potential to have a solid marriage as an adult.

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