Yes, sometimes you can get results that are misleading. You can get incorrect results if:
- You are taking certain prescription medications
- Are pregnant or recently gave birth
- In or entering Menopause
- Eat, drink, smoke, or brush your teeth prior to testing
- Do not use enough saliva
- Use too much saliva
- Dry your slide with artificial means – dryer, fan, or heat
Do not allow your saliva to fully air dry before reading.
False positive results mean that you think you are seeing ferning, but it is not a fern or is an abnormal fern for other reasons.
False negative results mean that you are ovulating, but not seeing ferning.