What is the reason why the pregnancy test stick shows one dark and one light?

A pregnancy test stick is a way to test whether a woman is pregnant. After the fertilized egg is formed in a woman's body, the body will undergo some changes as the embryo grows, which will be easily detected in the woman's blood and urine. If one dark and one light color appear after a woman uses a pregnancy test stick, it may mean that she is not pregnant, or the test rate is inaccurate. You can test it a few more times before making a judgment.

What is the reason for the pregnancy test stick to show one dark and one light ?

1. Only one control line appears on the pregnancy test stick: it means you are not pregnant.

2. Two lines appear on the pregnancy test stick, that is, the control line and the test line are both colored, and the test line is obvious and clear: it means that you are pregnant.

3. No control line appears on the pregnancy test stick within 5 minutes: It means the test is invalid or failed.

4. One dark and one light color on the pregnancy test stick: Generally speaking, if the control line is clear and the test line is very light, it means you may be pregnant, but it does not necessarily mean you are pregnant. In this case, you need to retest with a new pregnancy test stick and first-morning urine every two days.

Therefore, if the pregnancy test stick shows one dark and one light color, it means that you may be pregnant, but the result may not be accurate, and you need to repeat the test several times before you can reach a conclusion.

What does one dark and one light on the test paper mean ?

1. Taking pregnancy test too early

Generally speaking, an early pregnancy test should be successful 3 to 7 days after a woman's menopause. However, most women who are experiencing menopause for the first time are afraid of unexpected pregnancy, so they rush to test within 1 to 2 days of menopause, which can lead to inaccurate HCG testing or a dark and shallow HCG test. It is recommended to test again the next day or wait longer after menopause.

2. Urine concentration is too low

Early pregnancy test strips should be tested using the first urine in the morning as much as possible, because hormone levels at this time are most easily detected. If you really have no urine in the morning or drink too much water the night before, then you must ensure that the urine stays in the bladder for at least four hours before testing. Otherwise, it is easy to cause the pregnancy test paper to have one dark and one light.

3. Influence of drugs or diseases

Since the main hormone HCG in pregnancy tests will not only increase in levels after an unexpected pregnancy, but will also increase due to certain diseases, such as ovarian tumors, uterine cancer, stomach cancer, liver cancer, etc., resulting in a dark and light color situation, it is best for women to go to a professional hospital for reconfirmation when the test result is one dark and one light after menopause. If the result of one dark and one shallow test is due to illness rather than pregnancy, then timely treatment is necessary.

Many women use early pregnancy test strips to do the most preliminary pregnancy test, but if the method of use is incorrect or the purchase is unreasonable, it will affect the normal test results. Therefore, when using pregnancy test strips, you must pay attention to the following precautions when using pregnancy test strips.

Precautions for early pregnancy test :

1. If the pregnancy test paper you bought is stored for too long (more than 1 year), or the early pregnancy test paper is damp and not kept at normal room temperature (should not be refrigerated), it may become invalid and result in a false negative test result. So pay attention to the production date when purchasing.

2. If the pregnancy has just begun, or there is a possibility of ectopic pregnancy, the HCG level in the body is generally low. The test sample needs to be left to stand for more than 3 minutes (generally only 1 minute is needed), and it is necessary to carefully identify whether there is a weak positive - the color band in the test area only appears faintly.

3. After 3 months of pregnancy, HCG levels decrease and urine tests may sometimes be negative or weakly positive.

4. In extreme cases, such as hydatidiform mole and choriocarcinoma, the HCG level in the body will be too high and the urine test will not show a positive result.

From the above content, we can know that many women will use test strips to detect whether they are pregnant. At the same time, due to incorrect use, the test strips will cause many problems, including one deep and one shallow. Therefore, if you want completely accurate results, women still need to check in the hospital to know.