210.817.  Definitions. — As used in sections 210.817 to 210.852, the following terms mean:

  (1)  "Blood tests", any medically recognized analysis which uses blood or other body tissue or fluid to isolate and identify genetic or other characteristics in order to determine the probability of paternity or the probability of exclusion of paternity.  The term specifically includes, without being limited to, tests employing red cell antigens, white cell antigens, including the human leukocyte antigen (HLA) test, DNA methodology, and serum proteins and enzymes;

  (2)  "Bureau", the bureau of vital records of the department of health and senior services;

  (3)  "Parent", either a natural or an adoptive parent;

  (4)  "Parent and child relationship", the legal relationship existing between a child and his natural or adoptive parents incident to which the law confers or imposes rights, privileges, duties, and obligations.  It includes the mother and child relationship and the father and child relationship.