If I have a long cycle, how many days can I use the Ovulation Predictor test during the cycle?
You should determine the length of your shortest cycle in the previous 6 months and begin testing on the recommended date. Once you begin ovulation testing, continue to test until a surge is detected or if a rise in body temperature is sustained for at least 4 days and is 0.4 degrees higher than the past 6 temperatures.
If the cycle varies by approximately a week, you should expect to use up to 10 tests. Depending on how much your cycle varies, you will need more tests. As an example, if the shortest cycle is 28 days and the longest cycle is 42 days, you start testing on day 11 and might need to use 20 or more tests. This isn't a common scenario for most women but is possible. The majority of women (about 90%) will have a surge detected within 10 days of beginning the ovulation testing process.
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