Teste de gravidez falso positivo: 5 causas (e como evitar)

Pregnancy test is a false positive: the 5 causes may be (and how to avoid)

Pregnancy

The pregnancy test is a false positive is very rare, but it happens more often in the test from the pharmacy, made in-house, mainly due to the errors in the use of it or because it is out-of-date.

Another common cause for a false-positive result is the so-called “pregnancy is a chemical”, in which the egg is fertilized, but it can’t implant properly in the uterus, and that, ultimately, will not be taken. When this happens, the body begins to produce hormones and to carry a pregnancy, and, therefore, the first test is positive.

In addition to this, the women in the treatment for male infertility, with the injection of hCG, or who have tumors that are unable to produce this hormone, they can also have a positive result on a pregnancy test, even though you are not actually pregnant.

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5 causes of a pregnancy test is a false positive

The main causes of a pregnancy test is a false positive, they are:

1. Pregnancy test from the out-of-date

The changes in the results of a pregnancy test is usually used when the test is out-of-date and, for this reason, it is important to check the expiration date before you use it.

Any out-of-date it should be disposed of and must not be used.

1. The test done in the wrong way

Before you can use a pregnancy test from the pharmacy, it is important to read the manufacturer’s instructions, especially with regard to the time that it is necessary to wait for the reading of the results. This is because some of the tests might show a change of the end result after the recommended time to read.

In addition, prior to using for the test is also recommended to wash your intimate area with water for a few soaps and creams that are intimate which can react with the test, leading to the creation of a false positive, or negative, for example).

Find out how to take a pregnancy test from the drugstore, and how to understand the results.

2. Pregnancy is a chemical

This type of pregnancy occurs when there is fertilization of the egg, but the chicken was not able to attach to the uterus. In these cases, the body starts to produce a hormone (hCG), and therefore, can be detected in this test, urine or blood, however, as in the embryo, it was not in the uterus is removed and there is a miscarriage, bleeding, and that one can be mistaken for your period to be delayed.

3. The use of certain medications

Some of the drugs used in the treatment of the problems of infertility, they contain a high amount of hCG, the hormone that is measured in tests for pregnancy, and, therefore, may lead to a false positive within a short time following the treatment.

In addition, other medications such as some anticonvulsants, antibiotics, or anaesthetic can cause changes in the output. In this way, it is important to read the package leaflets of medicinal products, or do a blood test at the hospital and inform the provider about all the medicines that are used.

4. Health issues

Although it is rare, the false positive, it can also arise in the case of diabetes, especially in the case of tumors, the producer of the hormone, such as breast cancer or ovarian cancer, for example.

How to avoid a false-positive

In order to avoid a false-positive result it is very important that you follow all of the instructions, on the box of the test from the pharmacy, and, after taking the test, make sure that:

  • To repeat the test in 3 to 5 working days after you;
  • Do not re-confirm that the test after the time period specified.
  • Make an appointment with the doctor after 4 to 5 weeks.

However, the most reliable way to avoid any changes in the result of this is to do a blood test with a trial of the beta-hCG, as these cases are less likely to change the outcome. In addition, prior to the examination, the doctor will make an assessment to identify whether there are any medications, or other conditions that may result in a false positive. To know more about the examination of beta-hCG.

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