It shall be lawful for any physician to perform a sterilization procedure upon a person 18 years of age or over, or less than 18 years of age if legally married, provided that a request in writing is made by such person and provided, further, that prior to or at the time of such request a full and reasonable medical explanation is given by such physician to such person as to the meaning and consequence of such operation.
OCGA § 31-20-2