biological parent

Plural

biological parents

a person from whom one inherits DNA and is directly responsible for their birth

The child was curious about their biological parent and wanted to learn more about their family history.
The DNA test confirmed the biological parentage of the child, providing clarity in a complex family situation.
The biological parent played an important role in the child's life, providing love and support as they grew up.
She decided to reconnect with her biological parents later in life, eager to learn more about her roots.
The court granted visitation rights to the biological parent, allowing them to maintain a relationship with their child.