In the absence of other physical problems, a strong positive ovulation test result will usually turn negative within 24-48 hours, but the time required for the test to turn negative varies according to the condition of the individual’s body, so it is recommended to make a judgment according to the actual situation. After ovulation, the luteinizing hormone in the body will gradually decrease, which will cause the ovulation test result to gradually turn negative. The test result will not turn negative immediately, but will take some time, usually 24-48 hours. However, it is worth noting that ovulation test strips do not guarantee the accuracy of the data, which may be subject to errors due to factors such as hormones and urine concentration. If there is any ovulation abnormality or other symptoms, you should go to the hospital in time to get a clear explanation of the cause of the abnormality and then give targeted treatment.