A negative ovulation test 10 days after ovulation does not rule out pregnancy. Ovulation test paper is to detect the peak level of LH (luteinizing hormone) in the urine to predict ovulation, when the LH in the urine decreases after ovulation, so the ovulation test paper will become negative. After 10 days of ovulation, you need to go to the hospital to take a blood test for HCG, and this time will be able to accurately diagnose whether you are pregnant or not. If you use a pregnancy test, it takes about 15-20 days after ovulation for the test result to be accurate. Once two bars appear, it means that you are pregnant, and one bar is negative, requiring further tests to confirm the diagnosis. You can’t use ovulation test paper to diagnose pregnancy after 10 days of ovulation, you need to take a blood test for HCG or use a pregnancy test stick under the guidance of your doctor, who will interpret the results clearly. It is recommended that couples preparing for pregnancy go to the hospital for a pre-pregnancy eugenics health checkup to assess whether the body is suitable for pregnancy; quit smoking and drinking, develop good habits, and don’t stay up late. Exercise in moderation to maintain good health, avoid prolonged exposure to radiation or pollution, and get out of toxic and harmful work environments; maintain a happy mood; and avoid heavy physical labor.