Occasionally, a pregnancy test may be negative when the woman is actually pregnant and has symptoms of pregnancy. Most commonly this happens because the pregnancy test was taken too early, but it can happen for other reasons such as the following:
- Medication that can affect the result.
- Low sensitivity of the pregnancy test.
- Test not performed with the first urine of the day.
- Expired or damaged test.
In this situation, it is advisable to perform a pregnancy test again after 2-3 days to see whether or not you are pregnant.