Yes. Here the doctor may be mistaken, and ultrasound, if you do. The early term is very difficult to determine the pregnancy. Better Try again to make a test in a week. . . . And on your calculations how long can it be?
Home tests for pregnancy do not require special conditions and medical knowledge, they are easy to use ... and, apparently, that is why cause distrust of consumers. There is a very common opinion that all pregnancy tests are "lying", the results, both positive and negative, may be unreliable, and even that "home tests - clean water sell." And all because, according to doubters, it is impossible to determine pregnancy for a couple of weeks to determine the pregnancy of a long time in the urine. The reason for such a disrespectful attitude towards pregnancy tests is obvious: women do not understand how "works" this method, and misunderstanding always gives rise to distrust.
In fact, home tests for diagnosing pregnancy give a very high reliability of the result. The method is based on the identification of a pregnant woman in the urine of a pregnant woman hCG - human chorionic gonadotropin. This highly specific protein is distinguished exclusively by the nucleus tissues and with blood flow hits the maternal organism. Out of pregnancy, the appearance of HCG in the blood of a woman is impossible, so there can be no errors as a result. Two weeks later, the afternoon is contained in the urine of the future mother in an amount sufficient for testing. Usually this period corresponds to the first days of the menstruation delay.
The most commonly used pregnancy test is a strip of thick paper, one end of which is saturated with a special indicator (substance reacting to the presence of HCG). To obtain the result, the indicator must be soaked with urine; Some types of tests are placed under a stream of urine directly in the process of urination, others need to be lowered into a container with urine for several seconds. It should be noted that home tests are always supplied with detailed instructions with explanatory drawings.
Certainly, like any other product, a pregnancy test can be defective. At one end, the test should be seen a control strip. By its presence, the dough's suitability is judged. Therefore, before use, you need to carefully inspect the test and make sure that the control strip is available. With a positive result, the second strip appears next to the control or (on some import tests) the color of the control strip changes. If the second strip (or a color change is, depending on the manufacturer) does not appear - the result is negative, and the HCG, indicating the occurrence of pregnancy, there is no woman in the body.
In some features of the health status of a woman, a test can give a false negative result, that is, not to determine the coming pregnancy. This is due to the fact that chorionic gonadotropin does not always evenly accumulate in the blood of a future mother, and therefore, in the urine there may be its insufficient concentration - if the amount of hormone is lower than normal, testing will be unsuccessful. As a rule, in this case a very weak second strip appears, or it is manifested only partially (half, a third or at all dotted). Sometimes, with a very low level of hCG, the cherished strip is not manifested at all.
The accuracy of the test result may affect the error of the diet (for example, a wasteless diet, against the background of which the production of hormones is significantly reduced), reducing diuretic drugs, kidney disease, accompanied by violation of urine formation. Another reason for a false-negative result (there is a pregnancy, but the test "does not see") is associated with an approximation by the end of the menstrual cycle, and not in the middle, during the expected ovulation: because of a number of reasons, among which the most common stress, acclimatization, viral Diseases and hormonal imbalances, ovulation can be moved to an end or, on the contrary, the beginning of the cycle. In this case, the real period of pregnancy at the time of testing can be less than a week, and the level of hCG in the urine will be too small for "trapping" with a home test.
All listed test errors are associated with hormonal disorders or too low gestation. According to statistics, they constitute only 0.3% and cannot be the reason for the "accusations" of home test for pregnancy in unreliability. With a normal regular menstrual cycle and the absence of kidney disease and endocrine system, a test gives one hundred percent faithful result.
This is a common consumer error, and not only in the question of choosing a pregnancy test, but in general as a guide when buying goods: for the price, unfortunately, it is not always possible to judge the quality of goods. As for the choice of test, the difference in price between them is usually not very significant.
Various prices for the same, in fact, tests are explained by usual for marketing criteria: manufacturer country, brand popularity, cost of transportation, taxes, customs fees, packaging format, discounts or changing prices for a batch when purchasing.
The price of the test is also determined by the cost of production and an emphasis on the convenience of use: It is clear that the paper strip must cost less than the electronic "tablet" (tablet test) - after all, it is much easier to manufacture, faster and cheaper. It is safe to say that the price of pregnancy test is related to the comfort factor and the convenience of use.
However, none of the listed factors in no way affect the quality and accuracy of the main factor - the result of the test of pregnancy.
After all, absolutely all tests - expensive and cheap, Russian or imported, paper and tablet, "submersible" (which need to be lowered into the container with urine) or "inkjet" (placed under the stream of urine), those that appear the second strip, and those Which is changing the color of the main band - they all diagnose the pregnancy of small deadlines using a patented medical indicator that responds to the presence of HCG in the urine of the future mother.
Many women do not believe that with a latency of menstruation in just two to three days, and even more so without delay, it is possible to get a reliable result. And prefer to wait a week-another after the expected (and not coming) menstruation before testing - so that it is for sure! This idea is incorrect at once for two reasons.
First, the chorionic gonadotropin in the urine of a pregnant woman is growing precisely during the first two to three weeks, which corresponds to the period of expected monthly and first week of delay, but later its amount can essentially fluctuate that it may lead to the absence of the result.
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