What happens if you use morning urine on an ovulation test strip?

When a married couple has not been able to have children without using contraception, the female friend will use ovulation test strips to test her ovulation period and arrange sex during the ovulation period to achieve the goal of pregnancy. However, many female friends do not know whether the ovulation test strip can be used with morning urine. In fact, the ovulation test strip cannot be used with morning urine. So what will happen if the ovulation test strip is used with morning urine? Of course, it will affect the accuracy of ovulation detection.

1. Why can’t the ovulation test strip be used with morning urine?

Because of the accumulation overnight, the LH contained in the urine cannot represent the actual value.

Unlike normal urine sugar testing, ovulation test strips usually do not require morning urine. Ovulation test strips have certain sample requirements: collect urine in a clean, dry container. Urine from any part of the day can be tested, but first-morning urine is usually not used. The best time to collect urine is from 10 am to 8 pm. During the testing process for several consecutive days, it is best to use urine samples from the same time every day. If the urine sample is visibly turbid, it must be centrifuged, filtered, or allowed to settle before the supernatant is tested.

Fluid intake should be reduced in the 2 hours before urine collection because a dilute urine sample will impair detection of the LH surge. If the urine sample cannot be sent for testing in time, it can be stored at room temperature for 4 hours or refrigerated at 2℃-8℃ for 12 hours. For long-term storage, it needs to be frozen at -20℃ and avoid repeated freezing and thawing.

The testing time is also very important: women should first determine their menstrual cycle before testing. The algorithm is that one cycle is from the first day of this menstruation to the day before the next menstruation (the day of bleeding is the first day). When testing, you can refer to the "Ovulation Calculation Table" to determine the "Test Start Date".

2. How to use ovulation test strips

1. The normal menstrual cycle is 28 days. The ovulation day is 14 days before the next menstrual period. Generally, the test starts on the 11th day of menstruation and lasts for 6 days. However, not every woman ovulates during the middle of her cycle, and there may be no positive result during the 6-day test. Some women may ovulate prematurely due to the influence of environment, emotions and fatigue.

2. Reduce water intake within 2 hours before collecting urine, because diluted urine samples will hinder the detection of LH peak.

3. The changes in the color of the test line during the test should be observed and recorded. If the test result is negative but the color of the test line begins to decrease, it can also be regarded as the LH peak.

4. The test paper should be used to observe the reaction results within the specified time, and the results will be invalid after 30 minutes. For some negative test results, a light color band may appear at the test line after a period of time, so the results must be observed within the specified time.

5. Do not allow the test strip to get wet or touch the reaction membrane before use. Please close the can lid immediately after taking out the test strip from the can. The test strips should be used within the validity period and should not be used after the expiration date.

6. HCG in urine will interfere with the test results of the test paper, so the ovulation test paper is not suitable for pregnant women. If the LH peak appears for several consecutive days, you should first test whether you are pregnant.