Oova tests are most accurate with a minimum of 18 months from the DOM (date of manufacture). Each test packet includes a sticker with the DOM (date of manufacture) listed.
Beyond this time frame, the tests will still work, but results may be slightly (a few percentage points) lower than tests within the 18-month timeframe.
If you received any tests that were already past the 18-month certification window when you received them, please reach out to us at support@oova.life.