How to determine ovulation most accurately?

1. Measure basal body temperature: Measuring basal body temperature is a simple and quick method. Take your oral or anal temperature each morning when you wake up and record it on a chart. If the body temperature rises by 0.3-0.5 degrees Celsius, then this may mean that ovulation is entering.

2. Observe discharge: Women’s discharge usually increases at this time. If the discharge becomes clearer, translucent, and moist, then this may mean that you are entering ovulation.

3. Use a pregnancy test: A pregnancy test is a simple test that can detect ovulation. Apply liquid to the test stick and place it under your buttocks, wait a few seconds and observe the color on the test stick. If two lines appear on the test stick, this may mean that you are pregnant.

4. Measure blood pressure: Blood pressure can also reflect a woman’s ovulation period. If your blood pressure rises, it could mean you're ovulating.

The above are several common methods that can help you understand your ovulation period. However, different methods may have different results, so it is best to choose the method that suits you for testing. Additionally, if you have any health concerns, it is best to consult your doctor to ensure the accuracy of your test results.