An ovulation test is a tool used to determine the fertile window in a woman's menstrual cycle. It works by detecting the surge of the hormone luteinizing hormone (LH) in urine, which typically occurs 24 to 36 hours before ovulation. This helps individuals identify the best time to conceive. These tests come in various forms, including test strips and digital devices. They are easy to use and provide results within minutes. By tracking ovulation, women can better plan for pregnancy or understand their reproductive health.