Ovulation predictor kits (OPKs) are typically sensitive to temperature and humidity, but whether they require refrigeration depends on the specific brand and manufacturer. You should always check the packaging or the manufacturer's instructions for the specific storage requirements of the OPK you are using.
In general, most OPKs do not require refrigeration but should be stored in a cool, dry place away from direct sunlight and extreme temperatures. Storing them at room temperature is usually sufficient.
Exposure to high temperatures, humidity, or direct sunlight can affect the accuracy and reliability of the test results. If the OPKs are exposed to such conditions for an extended period, it is possible that they may expire or provide inaccurate results.
To ensure the best results and accuracy, it's essential to follow the storage instructions provided by the manufacturer. If you're unsure about the storage requirements or the validity of your OPKs, it's best to get new ones or consult with a healthcare professional for further guidance.