What is going on when the pregnancy test stick shows one light and one dark at night?

If the pregnancy test stick shows one light and one dark color, it is usually a weak positive, indicating that you may be pregnant. However, since the test is done at night, there will usually be errors. The pregnancy test stick is more sensitive to morning urine, so it is best to test the morning urine. If it is still one dark and one light color, it can basically be confirmed that you are pregnant. If you are really worried, you can go to the hospital for a blood test. The results of the blood test are very accurate.

Generally speaking, if the control line is obviously clear, but the test line is very bright, you may be pregnant, but it does not mean that you are definitely pregnant. In this case, you need to retest with a new reason after two days.

If the pregnancy test stick shows one dark and one light, it may be one of the following 4 situations:

1. HCG test is not obvious when you are just pregnant

When the fertilized egg implants, the placenta will initially produce HCG, but the amount produced will be relatively small. Therefore, if you use a pregnancy test stick too early, the HCG level in the body will generally be relatively low, which may cause one dark and one light color to appear on the pregnancy test stick. This is to be on the safe side, and it is best to test again after two days.

2. Low urine concentration

The pregnancy test stick determines whether a woman is pregnant by testing the human chorionic gonadotropin, or HCG, in the urine. If a woman drinks too much water at night, it will lead to a low urine concentration, which will dilute the hormone level. When testing for pregnancy, it may cause the pregnancy test stick to show one dark and one light color. Therefore, try to use the first urine after getting up in the morning for testing, at least ensure that the urine stays in the bladder for more than 4 hours, and do not drink too much water at night.

3. Ectopic pregnancy causes low HCG

Ectopic pregnancy refers to an abnormal pregnancy process in which the fertilized egg implants and develops outside the uterine cavity. Generally speaking, the amount of HCG secreted by the villi that develop after a woman becomes pregnant will be larger, and the concentration will continue to rise. However, if a woman has an ectopic pregnancy, the HCG in her body will undergo abnormal changes, resulting in a smaller increase. This situation may affect the results of women's pregnancy tests. If you take multiple pregnancy tests and the test stick always shows one dark and one light, you should go to the hospital for an ultrasound as soon as possible to check if there are any symptoms of ectopic pregnancy.

4. Caused by drugs or diseases

When a woman has some diseases, such as ovarian disease, uterine cancer, stomach cancer, etc., it will cause an increase in HCG in the body. At this time, if you use a pregnancy test stick to test, it may cause a dark and a light situation. Or some women usually take some hormone drugs, which will also affect the pregnancy test results. If a woman uses a pregnancy test stick after her menopause and finds one dark line on the other is light, it is best to go to the hospital for a check-up to see if there are any health problems.