Ovulation testing is a method used to determine the most fertile days in a woman's menstrual cycle. It typically involves using an ovulation predictor kit (OPK) that detects the surge of the hormone luteinizing hormone (LH) in urine. This surge usually occurs 24 to 36 hours before ovulation, helping individuals identify their peak fertility window. These tests can be beneficial for those trying to conceive, as they provide a clearer understanding of when ovulation occurs. By timing intercourse around this period, couples can increase their chances of pregnancy. Ovulation testing can also help track menstrual health and cycle regularity.