What Does a Single Red Line on a Test Strip Mean?

Update Date: 2024-05-24 Source: Network

For women, if they suspect they are pregnant, they can purchase early pregnancy test strips for detection. During the test, red bars will appear on the test strip. If there is only one red bar, it indicates that there is no pregnancy. If there are two red bars, it indicates pregnancy. However, sometimes due to certain limitations of early pregnancy test strips, false negatives may also occur. If you suspect you are pregnant, you can go to the hospital for a check-up.

One red bar on the test strip means that the early pregnancy test strip only shows one red bar, indicating that there is no pregnancy. However, the test of early pregnancy test strips has certain limitations. It must wait for the menstrual cycle to exceed five to seven days before it can be tested. Premature testing may result in false negatives. The principle of the early pregnancy test strip to test whether or not pregnant is actually to test the concentration of chorionic gonadotropin in the urine. After the menstrual cycle exceeds seven days, the level of chorionic gonadotropin in the urine has reached a certain concentration, so the early pregnancy test strip can detect whether or not pregnant.

Results of early pregnancy test strip:

1. Negative: A purple-red line appears in the test area (control line C), indicating that you are not pregnant.

2. Positive: Two purple-red lines appear in the test area (control line C and test line T), indicating pregnancy. The color intensity of the test line varies with the change of HCG concentration at different stages of pregnancy.

3. Invalid: No purple-red line appears in the test area or only one purple-red line appears in the test area (test line T), indicating that the test failed or the test strip is invalid, and it should be retested.

Mismeasurement of early pregnancy test strip:

1. Timing of the test. HCG generally appears in the urine several days after the fertilized egg implants, and it needs to reach a certain amount to be detected. Therefore, for women with normal menstruation, HCG may be detected in the urine after menstruation is delayed. However, women with long menstrual cycles or abnormal ovulation may need to wait until 40-44 days after menstruation stops to detect it.

2. Some diseases and drugs may cause false positive results. Some tumor cells, such as hydatidiform mole, chorionic carcinoma, bronchogenic carcinoma, and renal cancer, can also secrete HCG.

3. Do not use expired test strips. Because chemical reagents lose their effectiveness over time, pay attention to the production date when purchasing.

4. Do not use damp test strips. If the self-test result is negative and menstruation still does not come after one week, you should take the test again. If it is not positive, it is best to consult a doctor. Trust your body. If you experience various symptoms of pregnancy, regardless of the self-test results, you should remember that the principle of the early pregnancy test strip is only a preliminary test, and there may be errors in using it. The best method is to go to the hospital for HCG blood test, HCG urine test, and B-ultrasound examination.

If you are not ready to welcome the arrival of the baby, it is necessary to detect the early signs of pregnancy as soon as possible to determine whether or not pregnant, which is essential for later abortion surgery.