How do OPKs work? > How do I interpret ovulation test results?
If used correctly, ovulation tests are excellent predictors of ovulation. However, in order to detect the LH surge with accuracy, directions must be followed exactly. The most common mistake made with OPKs is generalizing the methods of pregnancy testing to ovulation testing – which leads to errors in use and in the interpretation of results. To get the most out of ovulation testing, read our Ovulation Test FAQ.
> How do I determine when to begin testing? > Ovulation Testing FAQ > Fertility Monitor FAQ > Capturing the Surge: Advanced OPK Suggestions! Ovulation tests – or ovulation predictor kits (OPKs) – are excellent tools for predicting ovulation, a woman’s most fertile time during her menstrual cycle. Unlike BBT charting, ovulation tests anticipate ovulation – not just confirm that ovulation has taken place. Ovulation tests work by detecting luteinizing hormone (LH). Just preceding ovulation, women experience an “LH surge” – a sudden, dramatic, and brief rise in the level of luteinizing hormone. Ovulation tests detect the LH surge, allowing you to accurately predict when you will ovulate. A positive result on an ovulation test means that the woman will most likely become fertile over the next three days – with peak fertility at 36 hours following the LH surge. How do OPKs Work? Luteinizing Hormone and Ovulation How do ovulation tests work? At the beginning of the menstrual cycle, the body b
