LH Vitam ® is a fast and easy-to-use home ovulation test. The strip test allows you to determine a womans fertile days with 98% accuracy by determining the increase in the concentration of luteinizing hormone (LH) in the urine . The level of this hormone increases just before the most fertile day of the month. The surge in the hormone LH causes one of the eggs to be released from the ovary, which is called ovulation. A set of five tests allows you to make several test attempts to indicate the most likely day to get pregnant. The test results will appear in 5 minutes as a colored line, easy to read and interpret on the test strip.