In Vitro Diagnostics (IVD, a commonly used medical abbreviation) are medical tests performed on samples such as blood, urine, tissue, or other bodily fluids outside the human body to detect, diagnose, monitor, or predict diseases and medical conditions. These tests help healthcare professionals make accurate clinical decisions by providing essential information about a patient’s health status. IVDs include a wide range of tools such as reagents, instruments, software, and in vitro diagnostic test kits, used in laboratories, hospitals, clinics, and even at home. These tests are critical for early disease detection, treatment monitoring, and improving patient outcomes.