Positive pregnancy test instantly makes an expecting mom euphoric. After that she may decide to take another test to confirm. Positive pregnancy test then negative result comes and the bubble of happiness goes pop. But how does one decide which pregnancy test is true and which is false? It could be that the earlier positive pregnancy test was wrong or this new negative pregnancy test is false. Woman with positive pregnancy test then negative worries that she has miscarried. It is too early for miscarriage hCG levels to vanish from your body within 24 hours. After miscarriage it takes few weeks for hCG levels to completely go from your body. So miscarriage is not a possibility at all. But yes, you can be having an Ectopic pregnancy. The hCG levels produced in that case will be erratic and you may get a positive pregnancy test then negative.
Positive then negative hpt can also be simply because you repeated the test immediately. Your second urine had low concentration of hCG and so you got a negative after positive pregnancy test. Positive pregnancy test followed by negative pregnancy test is also the case when you duplicate using two different brands. It is never recommendable 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. The error percentage of different pregnancy test is different.
Positive pregnancy test then negative: What happened?
- Not taking test correctly: If you do a mistake even while doing one step of 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.
- Diluted urine sample: If you immediately duplicate the pregnancy test then you might not have enough hCG. This is because only early morning urine during early pregnancy has enough hCG. A dilute urine sample will never give a positive pregnancy test at early stages. Using most sensitive pregnancy test may avoid this, but you have no guarantee of accuracy.
- Different brand pregnancy test: Using a different kind of pregnancy test requires you to go through the instructions. Even when you take a pregnancy test that you took before the specifications may change. 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 mid stream testing is risky. Getting a positive pregnancy test then negative is not uncommon if you use two different tests.
- Defective pregnancy test or Expired pregnancy test: If you repeat your pregnancy test with another kit make sure it is not defective. 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. This is because pregnancy tests have a maximum allowed life. It is around 2 years, after this they must expire.
- Taking tests after fertility treatments: Pregnancy Test after IVF gives you false positive pregnancy test. This is because during infertility therapies doctor gives you ovulation drugs. They can elevate the hCG levels in your blood. This gives a positive pregnancy test then negative. Later on as the hCG levels fall you get a negative pregnancy test.
- Pregnancy Test after miscarriage: If you are taking pregnancy test after miscarriage, make sure that the old hCG has left your body. Taking pregnancy test after miscarriage can give positive then negative pregnancy test. You need to talk to your doctor before trying to get pregnant after a miscarriage.
- Misinterpreting the earlier test: You may get evaporation lines during taking a pregnancy 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 time span will be correct.
- 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 had a higher sensitivity and could detect low hCG levels. You can take third pregnancy test with the same kit as first time.
- Ectopic pregnancy: Ectopic pregnancy is uncertain. It can give a positive pregnancy test then negative. This is 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 embryo. You may get a positive pregnancy test and then negative. But it should be positive pregnancy test then negative a week later or around that.
- Cysts or other Ovarian diseases: Cysts in ovaries can produce hCG hormone. This hormone changes the color of test line in pregnancy test. Cysts are mass of undifferentiated cells. They can elevate the hCG production in your body.
Positive digital pregnancy test then negative: Digital pregnancy tests don’t require you to read the results. But they are very quick. This means that you need to read the result very quickly else they will disappear. 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 positive pregnancy test then negative apply in that case too. Positive pregnancy test turned negative can be because you left the pregnancy test unattended for long. Positive pregnancy test changing or vice versa has no meaning. This is because after passing of time if reading the result there is no reliability of the results.
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 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 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 about. Positive pregnancy test after IVF can be wrong. Faint positive then negative pregnancy test is also a sign that you did a mistake while taking earlier pregnancy test. You might have read an evaporation line as positive during the first test. Positive pregnancy test then negative 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 positive pregnancy test turned negative? If you have no bleeding after positive pregnancy test followed by negative then you need not worry at all. It only means that the second pregnancy test is false. But positive pregnancy test then negative a week later needs medical attention. It could be that you took pregnancy test after taking fertility drugs. In that case you get false positive pregnancy test. Later the hCG levels fall down and you get a negative pregnancy test.
Can a pregnancy test be negative and positive the next day?
This is a more frequent case. Within a day such a change might surprise but hCG levels rise by doubling. So if you had a half cup full yesterday next day you’ll have a full cap. This is why it is possible that you get a negative pregnancy test and positive the next day.