Early pregnancy test strips should be familiar to everyone. When you need them, you can purchase them from a pharmacy, which is very convenient. If a woman does not have contraception and experiences menstrual cessation after sexual intercourse, she can use early pregnancy test strips to check if she is pregnant. But often some women indicate pregnancy with early pregnancy test strips. For example, what does a pregnancy test paper display as invalid?
What does the pregnancy test paper display as invalid
If only a red line appears at the top of the white display area, the result is negative, indicating no pregnancy; If two red lines appear above and below the white display area, it indicates a positive result and pregnancy. Due to the change in color intensity of the reaction line of the test strip caused by the concentration of HCG in the specimen, i.e. urine, this method can detect a minimum amount of HCG in urine of 25U/L. If the reaction line is light pink, it indicates that the HCG concentration in the body is not high and can be retested a few days later to confirm.
If there is no reaction line at the top of the test strip, it indicates that the test strip has failed or the testing method has failed. It may also be due to low levels of HCG in the body, and after one week, the menstrual cycle will still be delayed. You should do another self-test.
Which phenomena affect the accuracy of early pregnancy test strips
Some situations may affect the accuracy of early pregnancy test strips, and some understanding is needed. The specific situation is as follows:
Pay attention to choosing the correct testing time, as HCG usually only appears in urine a few days after implantation of the fertilized egg. And it needs to reach a certain amount to be detected. Therefore, for women with normal menstrual cycles, HCG may only be detected in urine after the menstrual cycle is delayed. Women with long menstrual cycles or abnormal ovulation may only be detected after 40-44 days of amenorrhea.
If no reflection line is found on the early pregnancy test strip during testing, it is considered invalid. To check for pregnancy using early pregnancy test strips, it is important to master the correct testing methods. Pay attention to placing the test paper in the urine, making sure that the urine submerges the length of the test paper. However, it should also be noted not to exceed the marked line, as exceeding it will result in inaccurate results.
