Will there be two lines on the pregnancy test stick if it is left for a long time? Will leaving the pregnancy test stick for a long time affect the result?

Generally speaking, if the pregnancy test stick is left for a long time, no two bars will appear, and the result will not be very accurate if the pregnancy test stick is left for a long time, so everyone must strictly follow the time written on the instructions for use of the pregnancy test stick to check the results.

Generally it will not become two bars.

Because the principle of pregnancy test sticks is to detect a special hormone secreted by women during pregnancy - human chorionic gonadotropin, referred to as HCG. This hormone exists in both women's blood and urine. The pregnancy test stick determines whether a woman is pregnant by the reaction between the built-in HCG antibody and urine. However, it cannot be ruled out that some substances in the air or the user's incorrect method or the quality problem of the pregnancy test stick may cause two bars to appear after being left for a long time.

Will affect the results.

Generally, the results of early pregnancy test strips or pregnancy test sticks are valid within five minutes. Generally, two lines will appear if they are left for a long time. If the time is too long, the pregnancy test sticks may have deviations in the results due to long storage time or other reasons. You can use more sticks and test more times, so that the accuracy rate is higher. So don't worry about this at this time, it is meaningless. If you have had sex before, without contraceptive measures, and are worried about pregnancy, you can go to the hospital for a detailed examination fourteen days after sex.

Retake the pregnancy test.

If the pregnancy test stick has been left for a long time and two bars appear, I would first recommend that you don’t be too nervous and don’t rush to make a judgment. It is best to wait until tomorrow morning to test your urine again to see if you are pregnant.

1. There are two red lines on the pregnancy test stick: one is in the test area (T), and the other is in the quality control area (C). This is a positive sign, indicating pregnancy.

2. One red line on the pregnancy test stick: Only one purple-red stripe appears in the quality control area (C), and no purple-red stripe appears in the test area (T). This is a negative result, indicating that you are not pregnant.

3. One line on the pregnancy test stick is dark and the other is light: one line is located in the test area (T) and is relatively light, and the other line is located in the quality control area (C) and is darker. This is a weak positive result, indicating the possibility of pregnancy.

4. There is no red line on the pregnancy test stick: No purple-red strip appears in the quality control area (C), indicating an incorrect operation process or the reagent strip has deteriorated and damaged.

5. In another case, if only the test area T is displayed and the control line C is not displayed, it also means that the result is invalid.

6. The test results will be displayed in about 5 minutes, so you must check it at any time within 5 minutes. If it is displayed after 5 minutes, it may be invalid or failed.