Full adoption requires the birth or biological parents to relinquish all legal parental rights so that all legal ties to the child or children are removed when the adoption becomes finalized. There are occasional instances when a biological parent decides to keep the child or children before the adoption is finalized, but these cases are infrequent relative to the kinds of coverage they get. In most adoption situations, the biological parent has already given up their rights, and the child is legally available for adoption before a placement is ever made.