Positive pregnancy test instantly makes an expecting mom euphoric. After that, she may decide to take another test to confirm. If a positive pregnancy test then negative result comes, the bubble of happiness goes pop.
But how does one decide which pregnancy test is real and which is false? It could be that the earlier positive pregnancy test was wrong or this new negative pregnancy test is invalid.
Woman with the positive pregnancy test and then negative worries that she has miscarried. It is too early for miscarriage as hCG levels cannot vanish from your body within 24 hours.
After a miscarriage, it takes a few weeks for hCG levels to flush out from your body. So miscarriage is not a possibility at all.
But yes, you can have an Ectopic pregnancy. The hCG levels produced in that case will be erratic, and you may get a positive pregnancy test then negative.
A positive then the negative test can also be because you repeated the test immediately and your urine sample (the second time around) had had a low concentration of hCG. As you know with not enough hCG to detect, the test will be negative.
A positive pregnancy test followed by a negative pregnancy test is also the case when you duplicate using two different brands.
It is never recommended that you use two different kinds or brands of pregnancy test while duplicating.
Using two different pregnancy tests doesn’t serve the purpose of duplicating the pregnancy test as the error percentage of different pregnancy tests are different.
Positive pregnancy test then negative: What happened?
1) Not taking test correctly
If you make a mistake even in one step of a pregnancy test, you can get a false negative pregnancy test. Positive followed by negative pregnancy test doesn’t mean that you are not pregnant. In most cases, you will be pregnant. Negative pregnancy test when you are pregnant is a false negative pregnancy test.
2) Diluted urine sample
If you immediately duplicate the pregnancy test, then you might not have enough hCG. It is because only early morning urine during early pregnancy has enough hCG. A dilute urine sample will never give a positive pregnancy test at the early stages. Using the most sensitive pregnancy test may avoid this, but you have no guarantee of accuracy.
3) Different brand pregnancy test
Using a different kind of pregnancy test requires you to go through the instructions. You need to read the instructions carefully before taking a pregnancy test. Similarly, if you first took a dip strip pregnancy test then duplicating by midstream testing is risky. Getting a positive pregnancy test then negative is common if you use two different tests. You can find many reputable brands on Amazon.
4) Defective pregnancy test or Expired pregnancy test
If you repeat your pregnancy test with another kit make sure it is not faulty. A defective pregnancy test will not be able to detect pregnancy hormone in your urine. If you see the control line, then you know that the test is working. Expired pregnancy tests also have lost the ability to detect pregnancy because pregnancy tests have a maximum allowed life. It is around 2 years, after this, they must expire.
5) Taking tests after fertility treatments
Pregnancy Test after IVF gives you a false positive pregnancy test because during infertility therapies doctor gives you ovulation drugs. These drugs can elevate the hCG levels in your blood. It may, therefore, cause a positive result and then a negative result scenario. Later on, as the hCG levels fall you get a negative pregnancy test.
6) Pregnancy Test after a miscarriage
If you are taking a pregnancy test after a miscarriage, make sure that the residual hCG has left your body. Taking a pregnancy test after a miscarriage can give positive and then a negative pregnancy test. You need to talk to your doctor before trying to get pregnant after a miscarriage.
7) Misinterpreting the earlier test
You may get evaporation lines after a test. If you consider them as positive, then you will get negative pregnancy test later. Similarly, if you get a positive pregnancy test after result reading time, then it is invalid. Next pregnancy test if read within the time span will be correct.
8) Less sensitive pregnancy test
If the second pregnancy test you are using is less sensitive, then you will get a negative pregnancy test. The first pregnancy test with higher sensitivity could detect low hCG levels. In this case, you should take a third pregnancy test with the same kit as the first time.
9) Ectopic pregnancy
Ectopic pregnancy is uncertain. It can give a positive pregnancy test and then negative because the hCG hormone is not doubling constantly and thus can be erratic. Molar pregnancy also has a similar case when the developing egg doesn’t form the embryo. You may get a positive pregnancy test and then negative. But it should be a positive pregnancy test and then negative a week later or around that.
10) Cysts or other Ovarian diseases
Cysts in ovaries can produce hCG hormone. This hormone changes the color of test line in the pregnancy test. Cysts are a mass of undifferentiated cells. They can elevate the hCG production in your body.
11) Digital pregnancy Positive test then negative
Digital pregnancy tests don’t require you to read the results. But they are very quick. It means that you need to scan the result before they may disappear. We recommend the Clearblue Digital Pregnancy Test with Smart Countdown. It’s very reliable, accurate and comes with a countdown!
Positive digital pregnancy test then negative depending on the time lapsed may be a sign of something is wrong.
It could also be that any of the above reasons for a positive pregnancy test and then negative apply in that case too. Positive pregnancy test turned negative can be because you left the pregnancy test unattended for long.
A positive pregnancy test changing or vice versa has no meaning because after passing of reading time, the result ceases to be reliable.
Am I pregnant if my positive pregnancy test turned negative?
Yes, it is most likely that you are pregnant provided your first pregnancy test was not an evaporation line.
The cases of getting false positive pregnancy test are rare. There is only a minor possibility that you took the test after IVF or miscarriage to get a false positive pregnancy test.
No matter how faint positive pregnancy test, you are most likely to be pregnant. You must either repeat a pregnancy test the next morning or get a pregnancy blood test.
Can a positive pregnancy test be wrong?
Pregnancy Test positive then turned negative might make you doubt the accuracy of the positive pregnancy test.
A positive pregnancy test can be wrong because it has only 99% accuracy. Pregnancy test positive then turned negative is not; however, the case that you need to worry.
Positive pregnancy test after IVF can be wrong. Faint positive then a negative pregnancy test is also a sign that you made a mistake while taking the earlier pregnancy test.
You might have read an evaporation line as positive during the first test. Positive pregnancy test and negative result the next day is either because you are using a defective or less sensitive pregnancy test.
Positive pregnancy test then negative – no bleeding
Is it possible that I’m still pregnant after the positive pregnancy test turned negative?
If you have no bleeding after a positive pregnancy test followed by negative, then you need not worry at all.
It only means that the second pregnancy test is false. But a positive pregnancy test and negative result a week later need medical attention.
It could be that you took the pregnancy test after taking fertility drugs.
In that case, you got a false positive pregnancy test the first time around. Later the hCG levels fell, and you got a negative pregnancy test.
Can a pregnancy test be negative and positive the next day?
It is a more frequent case. Within a day such a change might surprise, but hCG levels rise double.
This is why it is possible that you get a negative pregnancy test and positive the next day.