Learn about the normal range of white blood cells (WBCs) in different age groups and the types of WBCs and their functions. Find out how abnormal levels of WBCs can indicate infections, diseases, or other health conditions and how to get a WBC count test done. Learn what a white blood cell count test measures and what the normal range is for different groups of people. Find out what causes a high or low WBC count and how to prepare for the test. Learn what a white blood cell count ( WBC ) is, how it is measured, and what the normal range is for different sexes and ages. Find out what can cause a low or high WBC count and how to interpret the test results. Discover the normal WBC range for females and its health implications. Understand your blood results better—read the full article for essential insights.