Yes, almost always. Usually, the birth mother gives consent to adopt more than twenty-four hours after the birth of the adoptive child. Consent may be given to a judge, or (more often) to a judge’s representative, such as an adoption agency. Consent, once given, cannot be withdrawn.
Consent may also be required from the birth father if the baby was born within a marriage, or the unwed father meets certain legal criteria (e.g. adjudicated father, filed voluntarily declaration of paternity, etc.)
A child may also give consent to an adoption if the child is more than twelve years old and mentally competent.
Consent may not be required if a child’s parents are deceased or their rights have been terminated by the State.