Wiktionary
biological parent
n. One of a child's natural parents, either the male who supplied the sperm or the female who supplied the egg which interacted for the child's conception.
Usage examples of "biological parent".
So far as the Society was aware, neither biological parent had a family history of heart disease, diabetes or asthma.
Ushogbo, the only Cardinal to disappear, the only Cardinal without a biological parent, the only one originator of the theosophy that Tennys admired so much.