“In the case of the mother, the relation is verifiable from the birth itself. The mother’s status is documented in most instances by the birth certificate or hospital records and the witnesses who attest to her having given birth.”
“In the case of the father, the uncontestable fact is that he need not be present at the birth. If he is present, furthermore, that circumstance is not incontrovertible proof of fatherhood.”
United States Supreme Court observed in Tuan Anh Nguyen
Mama’s baby, Daddy’s maybe