In the 19th century, clinicians focused their attention on the need to perform diagnostic tests (especially clinical chemistry tests) in order to support the process of diagnosis, therapeutic choice, and assessment of patient’s health as well as prognostic tools in a disease.  A medical laboratory is your vital partner both in sickness and in health. Lab tests can help you understand your health and those results could motivate you to make changes that could improve your health in the future. Laboratory tests results not only allow the doctor to determine the disease but also to come up with an appropriate treatment. These tests are performed in the areas of chemistry, haematology, immunology and microbiology.