One bar on ovulation test paper during ovulation period

However, sometimes women may have issues with ovulation bleeding, which may cause them to experience a bar when using ovulation test strips. Don't worry if this happens, it's usually normal.

If you encounter a bar when using an ovulation test strip, it may be because the test strip is not accurate enough or the test time is incorrect. In this case, it is recommended to try changing the brand or model of test paper, or change the test time to be closer to the expected time.

In addition, you can also try other testing methods, such as body temperature measurement or B-ultrasound monitoring, to determine your ovulation period in a more accurate way.