The phrase "biological parents" refers to the people who are the birth or genetic parents of a child. These parents are responsible for passing on their genes to their child. Full definition
Of course, this means that a certain percentage of fathers will discover that they are not actually biological parents of children they have been raising. (texaschildcustody.org)
We have seen adopting parents who, upon first contact with their one - week - old newborn, express feeling as deep and caring as those of biological parents in the delivery room. (attachmentparenting.org)
These rights may be held by biological parents, third parties or a state welfare agency. (info.legalzoom.com)