How to Do the Test? 1. Calculate the length of your normal menstrual cycle Start counting on day one of your period (the first day of bleeding or spotting) — and stop counting on the first day of your next period. This is the length of your cycle. It could be anywhere from 20 to 45 days long. NOTE: If the length of your cycle is different each month by more than just a few days, then simply take the average number of days over the last three months. If your cycle is irregular, you may want to use your shortest cycle length to determine when to test. 2. Determine the day to begin testing Using the chart by finding the number that corresponds to the length of your cycle to help determine the day you should begin testing. If you do not know your cycle length, you may begin the test 11 days after your first period since the average cycle is 28 days. Example: if you have a regular cycle of 28 days and start your period on the 4th day of the month, begin with the 4th as day one, count forward 12 days and begin testing on the 15th of the month. 3. When to test on a day? It is fine to do the test at any time of the day but you should test at approximately the same time each day. For best results, do the test twice a day, 10 hours or more apart, for a few days prior to the ovulation. First morning urine is not recommended as it is concentrated and may give a false positive result. |