Can you believe the pregnancy tests
Pregnancy tests are very popular with many modern women. Their use is possible at home, which is undoubtedly very convenient. The cost of test strips is low, but the reliability of the result is 95-100%.
The principle of operation of home pregnancy tests is to determine the level of human chorionic gonadotropin in the urine. When its concentration reaches a certain value, the hormone reacts with the test reagents, as a result of which both control strips turn pink or reddish.
Manufacturers of tests highly appreciate their accuracy, but at the same time they still do not give a full guarantee that the result will be correct. In most cases an inaccurate false negative result can be associated with improper use of test strips. It must be remembered that they can be used only after a delay in menstruation.If the test is done earlier, urine hCG concentration is likely to be too low.
Errors in the test are also associated with non-compliance with instructions for use. To make the result as reliable as possible, it is necessary to do everything as it is written in the instructions. Sometimes women do not deeply immerse the test strip in a container with urine. This leads to the fact that it is not fully impregnated with biological fluid, as a result of which hCG is not detected.
Getting a false positive result is also possible. If the test shows that the concentration of human chorionic gonadotropin in the urine is increased, this can not be an error. But it is likely that the increase in hCG levels is not associated with pregnancy, but with hormonal drugs or the development of malignant tumors in the body. Also, the test can not diagnose ectopic pregnancy and pregnancy with certain pathologies.
A false result can also be obtained if the test has expired. At the same time, it can show both a negative and a positive result, but more often than not even a control strip is not detected on it.
To increase the reliability of the test result, it is necessary to analyze in the morning. Urine collected at this time contains the highest concentration of chorionic gonadotropin.
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