Which pregnancy test is better: advice on choosing
Dizziness, nausea, fainting - for such indirect signs, the pregnancy was determined by our grandmothers. Modern medicine offers women more reliable ways of early pregnancy diagnosis. Despite this, some women are resorting to folk methods even now.
Until now, the pregnancy test with iodine is popular, when a couple of drops of this substance are applied to urine impregnated paper and look at the discoloration. If it has not changed or turned blue, then there is no pregnancy, and if the sample has acquired a lilac shade, the woman is pregnant. Today it is easy to buy an express pregnancy test - a modern tool that gives a guarantee of a correct result in 95-99% of cases.
How pregnancy tests are performed
After visiting a pharmacy where a large number of different pills are sold, the woman has a question: "Which pregnancy test is better?" First, we need to consider the principle of their work.
Any( even Chinese) is basically based on the hormone hCG( chorionic human gonadotropin) present in the urine of pregnant women. It begins to develop after embryo implantation, with the concentration of the hormone doubling every 48 hours. Which device for pregnancy responds better to the presence of hCG?Here everything depends on the sensitivity, which is measured in international units per milliliter.
The concentration of HCG, sufficient for testing, is reached by the first day of the expected onset of menstruation. At this time, you can use a pregnancy test: Evist, Frautetst, Clesrblue and others. Although the latest generation models will show the correct result before the delay.
The most inexpensive and popular is the test in the form of strips impregnated with reagents. As a rule, its sensitivity is 25 mM.Although these strips are easy to use, the inconvenience is that the urine needs to be collected in a container, and then dipped into it by the indicated side. Usually the strip is held for a few seconds to the liquid, and then placed on a flat horizontal surface.
It is very important to comply with these conditions so that the reagents do not run off, but evenly distributed over the surface. After 3-5 minutes the result can be interpreted: two strips have turned red or pink - there is pregnancy;one strip is colored - there is no pregnancy. A test is considered positive, on which there is even a pale second strip. Analysis is best done by collecting the morning urine, since the concentration of hCG in it is maximal.
Tablet pregnancy test
The pregnancy test tablet is a more convenient analogue of the previous one, only here the reagent strip is placed in a convenient container - a cassette. This option is also called cassette. It is enough for him a few drops of urine, which with a pipette is placed in a special window.
After 3-5 minutes the result is already visible in the other hole of the cassette. The design of the flatbed test allows for a fairly accurate diagnosis. Its cost is slightly higher than the test strip.
Injection Test The most reliable device for determining pregnancy used at home is the inkjet device. It has a high sensitivity of 10 mMe.
Inkjet tests are extremely easy to use: just substitute for a stream of urine. By special channels, it enters the test section, where latex particles with the reagent are attached to the hCG and make it visible in the test hole. Thanks to its hygienic design, it can be used in sensitivity anywhere and anytime, not just in the morning. Jet tests are offered by different manufacturers in different price categories, but, of course, they are more expensive than the previous two types.
In electronic tests, the result is displayed on a liquid crystal display, but the principle is the same - the detection of hCG in the urine of a pregnant woman. This new type is not cheap, but it is convenient to use it, and the result is immediately understandable. The monitor displays an inscription on the presence or absence of pregnancy. You no longer need to look at the stripes and wonder whether there is one or only imagining it.
After the urine hits the test, the clock icon appears on its screen, just like on a computer. After 3 minutes, a minus or plus sign appears, or the inscription "pregnant" - is pregnant, or "not pregnant" - is not pregnant. The electronic test can be used before the delay, but the results will be less accurate:
- 4 days before the expected onset of menstruation, the probability is 51%;
- For 3 days - 82%;
- For 2 days - 90%;
- For 1 day - 95%.
Which device for pregnancy is better - it's up to you, depending on your preferences and budget. However, remember that the most reliable is the determination of hCG in the blood in the laboratory.