birth parent

or birthparent

noun

1. a biological mother birth mother or biological father birth father; a biological parent.

Example Sentences

“Parents used to keep adoption secret from their children,” Frankel said, because it was understood to be shameful “for all three legs of the stool: the child, the birth parent and the adoptive parents.”

From Seattle Times

An adoption agency that works with the LGBTQ+ community can be an especially helpful resource since they bundle services together, such as “home study” visits to assess applicants and their living situation, counseling for the birth parent and post-placement assessments.

From Seattle Times

His mother confessed that the man he believed was his biological father was actually his stepfather, and that his birth parent was a professional gambler who died in a hit-and-run accident.

From Salon

Dear Amy: As an adoptee and a birth parent, I have to correct your advice to “Anguished Aunt,” the sister who disregarded her brother’s wishes to have contact with his biological daughter.

From Washington Post

While Cahill has insisted in interviews and press materials that the film is based on a true story, as a reviewer, I still felt the urge to Google “types of adult adoptions” to double-check the validity of such an arrangement outside of formalizing an inheritance or reuniting with a birth parent.

From New York Times