Why do pregnancy test results come back different?

The earlier you take the home pregnancy test, the harder it might be for the test to detect HCG . Keep in mind that the timing of your ovulation might vary from month to month, and the fertilized egg can implant in the uterus at different times. This can affect the timing of HCG production and when it can be detected. When you take a pregnancy test, it’s looking for the amount of human chorionic gonadotropin (hCG) in your body. You can find hCG in your urine or blood. However, this chemical needs time to build up in your body, which can cause very early pregnancy tests to come back negative. Each day of early pregnancy, your body will create more hCG. Another reason for a different result could be that the urine is more diluted at the time you test negative, and less diluted more concentrated with a positive pregnancy test. More diluted could mean less than 20 mIU/cc hCG in the urine and less diluted more concentrated could mean a higher hCG level in the urine.A false negative pregnancy test is when you are pregnant but the test comes up negative. The most common reason for a false negative is that you took the test too early. 1 Even if your period is late according to your typical cycle, you might have ovulated later in the month. It’s not uncommon to occasionally have an off or irregular cycle.The timings of the results will depend on the type of test. According to the National Heart, Lung, and Blood Institute (NHLBI), the actual blood draw usually takes less than 3 minutes, and the results can take anywhere from a few minutes to a few weeks to come back.



Why am I getting different results on pregnancy test?

A: Getting two different results on a urine pregnancy test is not as uncommon as one would think. This somewhat strange situation can happen when you test very early in pregnancy, and when the hCG levels in the urine fluctuates depending on how diluted the urine is.

Can two pregnancy test give different results?

It’s also possible to get a positive test result followed by a negative result. If you use two different pregnancy tests, this could be the result of varying test sensitivity. Wait a few days and test again.

Why does one pregnancy test show positive and another negative?

The hook effect happens when you have too much hCG in your blood or urine. How is this possible? Well, the high levels of hCG overwhelm the pregnancy test and it doesn’t bond with them correctly or at all. Rather than two lines saying positive, you get one line that incorrectly says negative.

Can a pregnancy test be negative one day and positive the next?

Most pregnancy tests include instructions that encourage you to wait at least one week between a negative test and taking another pregnancy test. This is to allow time for your body to build up enough hCG (human chorionic gonadotropin) to be detected in your urine.

Why do I get different results on different pregnancy tests?

Another reason for a different result could be that the urine is more diluted at the time you test negative, and less diluted more concentrated with a positive pregnancy test.

What happens if you take another pregnancy test after positive?

If you have taken another test shortly after you have gotten a positive test result, then you are likely to get a false negative result. This is because the hCG in your urine is lower. Your urine is also more diluted. It is best to wait until the next day before trying to get a confirmatory test.

Why do I keep getting false negative pregnancy test results?

Short Gap Between Tests If you have taken another test shortly after you have gotten a positive test result, then you are likely to get a false negative result. This is because the hCG in your urine is lower. Your urine is also more diluted.

How long does it take for pregnancy test results to come back?

Results might take anywhere from a few hours to more than a day. Your provider might also choose to use a blood test to compare hCG levels during the pregnancy. Your hCG levels usually double about every two days during the first few weeks of pregnancy. If the levels don’t rise, it might suggest a problem with the pregnancy.

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