The establishment of early pregnancy is possible with the help of a urine test. In modern conditions to conduct such a survey by specific test systems, which are sold in the pharmacy network. A woman buys a self-test and analyzes of urine pregnancy. Each test system attached detailed instructions on how to correctly all you need to do, so it is important to follow these instructions precisely and correctly interpret the results.

How informative urinary test

To accurately determine the existence of pregnancy on the basis of urine analysis is necessary to make two consecutive intervals of seven days (with the proviso that there is another delay period). This is due to different sensitivity test systems which can produce false-negative and false-positive results. If the two results are negative urine tests, and they were carried out with the necessary period of time, it can be argued that the woman is not pregnant.

Urine tests are based on determining the content of a specific hormone, which is produced during pregnancy. This is the hormone human chorionic gonadotropin, or hCG. He begins to produce after getting a fertilized egg into the uterus. Later, he gets into the bloodstream and excreted in the urine, where its content is measured test systems.

Measuring the concentration of hCG produced in special units - mikromezhdunarodnye units per milliliter of urine (mIU / ml). The tests differ in different sensitivities, which can range from twenty-five to one hundred units. Most often you can find in pharmacies tests with sensitivities of 25 mIU / ml. Any analysis of the urine should be correctly interpreted and before the test to look closely at how sensitive it is designed.

The concentration of hCG depends on the duration of pregnancy, it increases gradually each week to the extent that it increases the time. If a woman has bought a test with low sensitivity (25 mIU / ml), and the content of the hormone in her lower than the sensitivity, then do a test show that pregnancy is not, and the result will be negative. Another situation when the hormone content in pregnant coincides with the sensitivity of the test. In this case, the result of a urine test shows that a woman is pregnant, such a result can be called positive.

Prerequisites for obtaining reliable results

Holding urine test requires compliance with certain conditions, without which it is impossible to judge the reliability of the results:

• you can not store a pregnancy test Pregnancy tests - early diagnosis   in the fridge. It should only be stored at room temperature. If the test system is stored in the refrigerator, even for a short time, it can not be used for the analysis of urine.
• urine analysis should not be diluted. The test is recommended only with a morning urine sample. Permissible to do a test during the day, but only if the last urination was three or four hours ago.
• the analysis results are to be interpreted only in the first five minutes. If more time has passed, it is impossible to say that the result is reliable. There is no doubt, if the first five minutes of the test system appeared faintly streak. Even such a result can be considered positive.

With urinary test can establish the fact of pregnancy, but it is impossible to judge where it develops (in the womb or outside of it). There is another feature of this type of research - analysis is not quantitative, that is, it can not be accurately judged based on the concentration of hCG in a woman's body. Exact figures gives the concentration of human chorionic gonadotropin testing of blood.

Marina Solovyov

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