Marriage test biochemistry refers to the examination of liver function, kidney function, blood sugar, blood fat and other indicators. The items that generally need to be checked in the marriage examination include infectious diseases, mental diseases, reproductive system diseases, genetic diseases and routine examination. 1. Infectious diseases: blood or blood smear screening includes AIDS, syphilis, gonorrhea, hepatitis B and other infectious diseases; 2. Mental diseases: need to be examined by professional psychiatrists, including mania, schizophrenia and other mental diseases; 3. Reproductive system: to determine whether there are malformations in the reproductive system and to understand the health of the reproductive system; 4. Genetic diseases and family genetic diseases: checking chromosomes, checking for genetic diseases such as primary epilepsy and albinism, and determining whether there are genetic diseases such as cerebral palsy, chromosomal abnormality and mental retardation in the family. 5. Routine examination: urine routine, blood routine and biochemical examination. Marital examination should be done before marriage to ensure that both parties are in good health.