Can I Get False Positive or Negative Results?

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.

Disclaimer: We are not, nor do we claim to be, medical professionals. Any opinions on this page or within this website are just that (opinions). If you are in need of professional medical advice, please consult your doctor.