Ovulation test strips can be tested from the 11th day of menstruation and monitored for 6 consecutive days. Ovulation test strips are used to predict whether ovulation has occurred by detecting peak levels of luteinizing hormone. Generally women of childbearing age with regular menstrual cycles can start the test on the 11th day of menstruation and keep testing for 6 days, with any urine within a day. Ovulation test strips are used immediately after removing the test strips by dipping the absorbent stick into the urine and leaving it there for 5 seconds, the result will be displayed within 3 minutes and will not be valid after 30 minutes. The use of ovulation test strips can clarify the time of ovulation, so as to achieve the best time for conception or the purpose of contraception during the safe period. However, ovulation test strips are not completely accurate, ovulation is a complex physiological process, and will also be affected by some related hormones, and it is recommended that women who need to monitor ovulation should use them under the guidance of a doctor. If you have any other questions, it is recommended that you consult a medical professional for guidance.