Test Strips 1 leaflet + 1 urine cup. Over 99% accurate. Easy to read. Predicts ovulation 24-48 hours in advance. Results in just 3 minutes. Compare to Answer Ovulation Tracker.** Interpretation of Results: Positive for LH Surge - If two color bands are visible and the test band is equal or darker than the control band, this is a positive result and this is a good indication that the LH surge is occurring. Negative for LH Surge - If two color bands are visible but the test band is a less intense color (more pale), than the control band or cannot be seen, this indicates that the LH level is at or near the normal level and there is no surge in LH levels in process. Invalid Result - If no control band appears within 3-6 minutes, the result is invalid and should be ignored. Walgreens Pharmacist recommended* Trusted since 1901. Health expertise you rely on. walgreens.com. Questions or comments? 1-800-894-1077. **This is not manufactured or distributed by Church & Dwight Co., Inc. or Armkel, LLC, distributors of Answer. *Walgreens Pharmacist Survey Made in CN Immerse the strip in the urine for at least 5 seconds. Do not pass the MAX line. Lay the strip flat. Read results in 3-6 minutes. Please refer to side panel of product packaging for Interpretation of Results © 2017 Walgreen Co.