After conception, the woman’s body gradually increases in blood pressure, which produces trophoblast cells - these are the precursors for the formation of the placenta. Thanks to its presence in urine, early diagnosis of pregnancy can be carried out.
The test can be carried out already after the second day of missed period.
But many women who are faced with this issue for the first time do not know how to choose such a product, how to use a pregnancy test and how to avoid mistakes?
Mechanism of action
The standard test that determines the presence of human chorionic gonadotropin in the urine has two strips - control and diagnostic.
The first one works if any moisture gets on the surface.
A diagnostic strip It has special substances(antibodies), which react to the presence of hCG in the urine.
During direct contact of human chorionic gonadotropin with labeled antibodies, the diagnostic strip turns red.
Buying a pregnancy test
Buy tests only in pharmacies. This will help you avoid purchasing a low-quality fake.
When purchasing a pregnancy test, check the integrity of the packaging. The strip should be packed in thick cellophane. Sometimes it is filled with air.
If the product's expiration date has expired or you find damage to the packaging, then there is no point in doing such a test - the result will be unreliable.
When studying a wide range of pregnancy tests, you see products from different companies and different price ranges. But the reliability of the result does not depend on the manufacturer and cost. Is it true, more expensive tests respond even to the lowest dose of human chorionic gonadotropin.
That's why, if you can't wait to find out the answer to a question whether you are pregnant or not, but only a couple of days have passed since your missed period, give preference sensitive test . Thanks to him, the situation will certainly become clearer.
When to take a pregnancy test?
If you want to achieve maximum accuracy in diagnostics at home, in the evening before the test, do not eat fatty foods and refuse sexual contact.
It is advisable to use the test strip in the morning, taking the first urine of the day for research.
Do your research only before meals. After eating, the answer will be untrue.
It is at the beginning of the day that the concentration of the hormone is highest and the result will be the most accurate. Therefore, immediately after waking up, go to the toilet.
Collect the urine in a container and lower the tip of the test strip into the urine to the indicated mark, holding it there for a couple of seconds. After this, place the test on a horizontal surface.
The result will be ready in 5 minutes. After 10 minutes the test is considered void.
Two stripes indicate that conception has occurred. But it is worth considering that positive result may occur even in the absence of pregnancy. This mainly occurs due to hormonal imbalance in the body.
To find out exact result , it is better to go to a gynecologist after the test, who, after examining the uterus, will be able to determine whether pregnancy has occurred.
Sometimes on early stages If the gynecological examination was not indicative, an ultrasound examination or tests are prescribed.
But even if the second line appears faint and barely noticeable on your test, most likely you are pregnant. You can additionally use a couple more tests from other manufacturers.
Remember, in some cases, hormone production begins not on the 6th day after conception, as usual, but on 14-15.
This is the period of maximum concentration of human chorionic gonadotropin. Therefore, if the test result is negative and there is no period, there is a reason to wait a few more days and repeat the study, which next time, perhaps, will tell you the long-awaited answer.
Types of tests
- Strip strip– the most common type of pregnancy test. This is a thin strip with a reagent inside. Using this test, human chorionic gonadotropin is determined in the urine. Open the package immediately before use.
- Tablet test- this is an analogue adapted to home conditions laboratory diagnostics pregnancy. It gives the most accurate result. It differs from test strips in that it does not need to be immersed in a container with urine and this product is more reliable because it is protected in a plastic box. You should take a portion of urine into a disposable pipette and insert 4 drops into the special window of the test cassette where the reagent is applied.
- Electronic test. The method of application is identical to the tablet and conventional tests. But in this case, under the influence of human chorionic gonadotropin, not a colored stripe will appear, but the inscription “pregnant” or “not pregnant.”
- - this is the most reliable method early definition pregnancy at home. This product has a more sensitive reagent. This affected its cost, which is higher than the price of tablets and test strips. You can find out about the onset of conception 4 days before the start of menstruation. Jet test It is especially convenient because you do not need a container to collect urine.
Remove the cap from the cassette and grab the test in the place where there is a mark in the form of an arrow. You need to place the marked tip, which was under the protective cap, under a stream of urine for a few seconds and then close the test with the cap.
The result according to the standard will be ready in 5 minutes and will become invalid after 10 minutes.
The study can be carried out at any time of the day, because a very sensitive reagent detects the presence of human chorionic gonadotropin, regardless of its concentration level. But follow the instructions as precisely as possible, otherwise the result may be false.
False positive pregnancy test result
False positive result- this is the case when the test shows 2 stripes in the absence of pregnancy.
In low-quality tests this can happen: that the dye will split off from the conjugate before the entire antibody-hCG-dye complex reaches the reaction zones.
This is how blurry spots appear. This result is often mistaken for a “false positive”. But true false positives are extremely rare.
Besides, a faint second stripe appears, if the test is “overexposed”, that is, study the readings after 10 or more minutes.
A similar line is formed due to the evaporation of water from the surface of the dough. This destroys the conjugates, which release the dye.
It is precisely because not every woman strictly follows the instructions and incorrectly interprets the test result that doctors, especially old-school gynecologists, do not trust too much early diagnosis pregnancy carried out at home.
A false positive response may be caused by taking specific medications, kidney problems, or due to large quantity drunk liquid.
Sometimes this result indicates about the presence of a trophoblastic tumor. Some gynecological diseases may provoke increase in the level of human chorionic gonadotropin and in order to exclude them, it is necessary to contact a gynecologist after a positive test result.
If you were given hCG to maintain the luteal phase(preparations Pregnil or Profazi), then traces of this hormone remain in the body for 10 days after the last dose of the medication. Therefore, a pregnancy test in such cases gives false positive result.
False negative test
There are times when tests give false negative. This occurs much more often than cases with a false positive result.
A false negative test is typical for conducting the test too early. or for a low sensitivity test.
During a pregnancy that is on the verge of, human chorionic gonadotropin will not be produced as intensively as during a normally developing pregnancy.
Anyway a pregnancy test allows women not to run to the doctor at the slightest delay, but first check at home and only then consult a doctor to clarify the results.
It is after this that we can clearly speak about the presence or absence of pregnancy.
Pregnancy tests are an accurate home method for determining conception. This technique allows a woman to timely establish the process of fertilization. Stripes have different prices. This allows you to buy any product you like. Not all tests are accurate. Pregnancy can only be confirmed in a medical setting.
A woman's pregnancy depends on her menstrual cycle. Its characteristics are formed by the hormonal system. The first phase is formed by estrogen. This hormone allows the uterus to prepare for the upcoming conception. Under its control, the endometrium is formed. It covers the surface of the uterine body. Gradually increasing the layer gives several layers. Estrogen also provokes the production of follicle-stimulating hormone. It affects the activity of the ovaries.
Each ovary contains eggs. They are involved in the process of conception. When follicle-stimulating hormone appears, one of the germ cells is activated. It moves into the lining of the ovary. A follicle is formed in the resulting area. The follicular neoplasm is exposed to the work of another substance - luteinizing hormone. Under its influence, the membrane of the neoplasm bursts. The egg leaves the ovary. This phenomenon is called the ovulatory phase. During ovulation married couple the chances of conceiving a child increase.
During conception, sperm enter the uterine cavity. They are involved in fertilization. The fusion of germ cells produces a zygote. The cystoblast gradually moves from the fallopian tube into the uterine body. The zygote attaches to the wall of the organ and causes the formation of the chorion. The tissue does most of the work of the placenta. The chorion consists of several layers. IN top layer hormonal production occurs. The chorion begins to produce human chorionic gonadotropin. This hormone is typical only for the body of a pregnant woman. There are two ways to identify it:
- home testing;
- taking a blood test for hormones.
The first method is to obtain a chemical reaction of the substance with which the strip is treated. The second technique allows you to quickly determine the presence of a hormonal substance in the bloodstream. Both methods are effective. It is also recommended to use them together. This will help determine the exact presence of conception in a given menstrual cycle.
Varieties of stripes
There are a wide variety of stripes. They differ in the method of use. Also the tests are different chemicals. There are such types of pregnancy tests as:
- inkjet gadgets;
- electronic devices;
- standard stripes;
- drip cartridges.
Inkjet gadgets are treated with a special reagent, which gives quick chemical reaction with urinary fluid. When in contact with urine, the gadget is able to give results within three minutes. You can examine the resulting image after 5 minutes. These pregnancy tests are easy to use at home. They can be used in any situation without prior preparation.
The modern pharmaceutical industry is developing rapidly. It allows you to use modern techniques V Everyday life. In order to establish conception, an electronic gadget was developed that displays the result on a special screen. You can take a pregnancy test in any conditions. The gadget beeps from the moment the study is completed. After this, you can examine the result within 24 hours. The downside of this device is the price. The average cost can be 950 rubles for one gadget.
The greatest preference is given to conventional paper tests, which are produced by many pharmaceutical companies.
The strip has two zones treated with different chemicals. One zone is considered control. It shows how pregnancy tests should be colored. The main focus is on the second zone. This strip appears only upon contact with human chorionic gonadotropin. If it appears, the woman is pregnant.
Drip cartridges are widely used. These products have two areas for study. Apply into a small round hole urinary fluid, taken according to certain rules. When applied, contact occurs with the substance intended to color the main field. In the second section of the test there is a wide window in which the exact result appears. The woman receives an answer according to the attached instructions.
Proper Use
Pregnancy tests must be used correctly. The pharmacist will tell you how to use the pregnancy test. This will give you an answer. How to take a pregnancy test is described in the attached instructions. There are several general rules, which allow us to establish the presence of conception.
It is best to take a pregnancy test in the morning. This rule is connected with the characteristics of the hormonal system. Largest quantity human chorionic gonadotropin is observed after an overnight rest. The patient does not go to the toilet at night. Urine is completely stored in the bladder. If the visit occurs at night, the concentration of the hormonal substance decreases.
You should also avoid drinking large amounts of liquid before taking a pregnancy test. The use of a strip to determine pregnancy in the early stages is carried out only after the accumulation of a certain amount of human chorionic gonadotropin. If the patient drinks large amounts of water, the concentration of the substance decreases. This may lead to erroneous results.
The instructions included in the pregnancy test contain a lot of useful information. It clearly states that the test shows pregnancy only in the presence of human chorionic gonadotropin. How to use the pregnancy test is also described in the annotation included with the package.
Many women ask how to take a pregnancy test at home. Doctors recommend observing the following conditions:
- timely study of the result;
- use of a dry horizontal surface;
- correct decoding.
How to properly take a pregnancy test can be found in the instructions for its use. Experts advise studying the response received in a timely manner. An early pregnancy test can show the correct answer only at a strictly specified time. If the study is carried out earlier or later than the required time, an error may occur.
It is recommended to place the pregnancy test on a clean, dry surface. This will allow the reagent to be evenly distributed on the strip. Correct distribution allows the areas of interest to be colored to the required degree. If the study is carried out on a curved surface, you can get an erroneous answer.
You also need to be able to correctly decipher the response received. Testing allows the patient to clarify whether conception occurred during the menstrual cycle. When using a regular strip, the appearance of two stripes is considered a positive result. The degree of staining does not affect the response. The electronic gadget writes the answer on a special board. A drop test to determine pregnancy gives an answer in the form of a plus or two stripes.
How to rate an answer
It’s not for nothing that many doctors recommend the best time to take a pregnancy test. Compliance with these rules gives a woman a chance of getting the correct answer. To understand how a pregnancy test works, you need to study the instructions.
The control zone reacts with any liquid that does not contain hormones. A woman who is not pregnant will see only one stripe on the gadget.
The main substance enters into a chemical reaction with human chorionic gonadotropin. The hormone is produced by the chorion and appears only in the body of a pregnant woman. Thanks to this, you need to understand when a test can show pregnancy. The test substance is colored only upon contact with gonadotropin. Two stripes appear in a pregnant woman.
Testing time
You also need to know when is the best time to take a pregnancy test. It will only show a response when exposed to a certain amount of the hormone. Many types of strips only respond to 25 U of gonadotropin. Taking this into account, you can calculate the testing time.
Ovulation occurs two weeks before the next menstruation. At this time, the egg is localized in the abdominal region. The cell can remain in the peritoneum for no more than eight hours. The shell of the cavity is lined with muscle fibers. They contract intensely. The contraction causes the female reproductive cell to move into the lumen of the fallopian tubes.
Conception occurs in the cavity of the tubes. After fertilization, the blastocyst begins to move along the fleecy layer of the pipe. All villi contract towards the uterine cavity. Because of this feature, the zygote enters the uterine cavity after 3–4 days. Within 24 hours, the blastocyst should move deeper into the endometrial tissue of the uterus. Taking into account all the listed times, the chorion is formed on the seventh day after ovulation. From this moment, human chorionic gonadotropin begins to be produced.
The growth of matter occurs daily. The volume of the hormone can double in a day. Using simple calculations you can determine when to take a pregnancy test. Increase in hCG up to 25–30 units occurs 9 days after the ovulatory phase. For many patients, this date is the second day of delay in the arrival of the next menstrual period. Also, these qualities help to clarify at what time a pregnancy test will show conception. With a weakly positive response, the period is no more than two weeks from fertilization.
Getting false negatives
Not in all cases, a pregnancy test shows the correct answer. Some patients complain that they received a negative decision in the presence of conception. There are various reasons for this problem. A negative decision can be obtained if the following negative factors are present:
- anembryonic pregnancy;
- ectopic location of the embryo;
- threat of spontaneous miscarriage;
- weak chorion activity.
For many women, the reason for a negative result is the absence of an embryo. Such conception is accompanied by the formation of a fertilized egg that does not have a fruit. In this case, the chorion produces gonadotropin to a lesser extent. The level of the substance increases very slowly. Stripes long time cannot establish the presence of conception. If such a problem is detected, vacuum abortion is prescribed. It allows you to clean the uterine cavity without loss to the patient’s health.
A common reason why pregnancy tests give a negative answer is the uncharacteristic location of the ovum. After fertilization, the egg stops moving and attaches to the surface of the fallopian tube. From this moment on, the hormone is produced in small quantities. To establish an ectopic conception, you should undergo a number of additional examinations. Only they make it possible to determine the location of the zygote.
The onset of conception may be accompanied by the threat of miscarriage. Can a pregnancy test detect this disease? Doctors answer positively. If the strip shows faint coloring 3–4 weeks after ovulation, there is a threat. With this problem you need to contact a specialist. The doctor will prescribe a number of procedures that will help determine the disease.
Since gonadotropin is produced by the chorion, the answer depends on its activity. Weak tissue activity is observed against the background of hormonal system disorders. If the chorion is weak, you will need to take a pregnancy test several times. Confirmation of weak growth of the chorionic substance indicates a pathological function of the future placenta.
Receiving a false positive response
Knowing how a pregnancy test works, you need to understand the risk of getting a false happy result. This response may depend on the following pathologies:
- introduction of a cystic infection;
- incorrect use of the test;
- the presence of cancer;
- defective strip.
A common cause of a sharp increase in hCG is infection in ovum. In this case, the pregnancy does not develop properly. The risk of rapid spontaneous abortion increases. Such patients complain that there are no signs of conception, but the tests are positive. The doctor does not ignore these complaints and conducts additional medical examination.
Improper use of strips can also lead to a false positive result. Pathology occurs in patients who have undergone the procedure for stimulating ovarian activity. To activate the production of your own egg, potent drugs are introduced into the body. hormonal drugs. In the middle of the menstrual cycle, the doctor injects medicine, containing a large dose of human chorionic gonadotropin. It causes the follicle to rupture. Complete elimination medicinal product occurs several weeks after the procedure. Early testing gives a false positive result.
Sometimes you can hear that the procedure gives positive decision in men. Knowing how a pregnancy test works, doctors determine the presence of cancer. Many cancers belong to the hormone-producing group. Oncology is accompanied by the production of substances related to gonadotropes. This is what makes it possible to obtain a positive decision in the absence of conception.
Application procedure
The question is often asked how to use a pregnancy test correctly. There are a number of requirements that must be met before using a pregnancy test. It is not recommended to drink large amounts of water several hours before use. Liquid promotes frequent urination. This leads to a decrease in the concentration of gonadotropin. The risk of obtaining a negative result increases.
Before use, you need to prepare a clean container to collect urine. You can purchase a test jar at a pharmacy kiosk. The strip should be lowered into the collected liquid to the established mark. Aging occurs according to these instructions. After soaking in urine, the strip is placed on a horizontal surface for several minutes. Then you need to study the result.
If a woman uses an electronic or inkjet gadget, then the rules are slightly different. The cassette is placed under a stream of urine for three minutes. After this, you need to place the test on the surface until the result appears. The electronic device is capable of taking measurements anywhere.
Also, many patients wonder whether it is possible to take a pregnancy test during the day. You can use the strip only if these rules are followed.
Efficiency of the method
You need to understand at what stage a pregnancy test can be used. Correct use The second day of delay is considered. From this time on, there is a sufficient amount of gonadotropin in the body. Not all patients have a test strip correct result. Errors occur for the following reasons:
- misuse;
- fetal gender;
- the presence of concomitant pathologies.
Many patients make mistakes when using it. As a result, the test is faulty. To get a reliable answer, you need to carefully study the instructions included with the package.
It was found that pregnancy with a girl differs in the amount of hormone. Many mothers of such children say that a long time passed before the pregnancy test showed the answer. Boys are discovered earlier.
Errors can also occur with the development of concomitant pathologies. Hormonal, vascular and neurological diseases cause disruption in the functioning of the chorion. Results can only be obtained in laboratory conditions. This problem is encountered by patients with a history of diabetes. The presence of illnesses requires more careful monitoring by doctors.
To understand when to take a pregnancy test, you need to understand how it works. This will allow you to use the cassette correctly, without making mistakes. If in doubt, you should donate blood for a hCG test.
IN home conditions It is possible to determine the onset of pregnancy if you have a pregnancy test, which can be purchased at a pharmacy. Each purchased test detects pregnancy by the amount of human chorionic hormone in the urine.
It is this hormone that increases in the body of a pregnant woman, while in a non-pregnant woman it remains at a level of zero. As soon as a woman suspects she is pregnant, she can safely go to the pharmacy. By purchasing, you can verify the presence or absence of pregnancy.
The most common and popular pregnancy test is the test strip. This pregnancy test is easy to use and is the cheapest of all the options presented. This test gets its name from the fact that it looks like a paper strip soaked in a reactive substance.
How to use a pregnancy test
To determine pregnancy, you need to collect morning urine in a small container, dip a strip into it, and then place it on a dry, flat surface. In a couple of minutes you can determine the result. If only one line is clearly visible on the test, then the result is negative and there is no pregnancy; if both lines appear, the result is positive.
Pregnancy test. One clear strip is visible, the result is negative.
Pregnancy test. Two stripes are visible, the result is positive. You are pregnant!
The disadvantage of this test is that if it is used incorrectly, the result may be inaccurate. A tablet pregnancy test is considered more reliable. There are two holes in this test. Urine is placed in the first hole, and after its interaction with the reactive substance in the second hole, a positive or negative result.
The most accurate pregnancy tests
The inkjet pregnancy test is endowed with the greatest accuracy in determining the result. The cost of this test is significantly higher than others. The basis of the test is urine, which turns blue when reacted with. It should be understood that it is best to use it only during a certain period of time. The production of the hCG hormone begins after a week from the moment of fertilization.
The most reliable results determined after the first day of menstrual delay. In view of this, from this moment on, a woman can safely conduct such a test. In addition, there are tests that detect pregnancy from the first day of conception or a week before the expected menstruation.
These tests include inkjet tests. Almost all pregnancy tests show results with 99% confidence, which is why this method can be used with confidence to determine pregnancy, having verified its effectiveness in your own example.
If you still have doubts about the effectiveness of the test used, the best solution would be to visit a doctor, who will determine by touch the presence of a corpus luteum in the uterus.
Instructions
Follow the instructions to complete the test according to the instructions. Typically, this requires either holding the test under running urine or immersing it in water in advance. collected urine for 2-3 minutes, although sometimes 30 seconds is enough. Important: urine should be used in the morning, collected immediately after waking up! After contact with urine, it is recommended to wait 10 minutes for the biochemical indicators to work.
Some types of tests, such as plate or reservoir tests, work on a slightly different principle. To use the tablet test, drop a drop of your urine into each of its windows using a pipette. To use the reservoir test, collect your urine into the reservoir of the test system. Both of these types of tests are considered more advanced, more accurate and sensitive, but they are more expensive.
A pregnancy test usually has 2 indicators in the form of stripes. The first line means that the biochemical indicators have worked and the test is suitable for use. The second strip indicates pregnancy. The absence of the second means that you are not pregnant, the absence of the first means that the test is spoiled and is not suitable for use.
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note
Even a very pale second line indicates pregnancy. Taking alcohol, drugs or smoking does not affect the test result. If you are or have been taking birth control, take the test on the 19th day after unprotected sex. In this case, do a control test no less than 3 days after the first test. Some fertility drugs can interfere with the test results, causing the system to show a false positive result.
Regardless of the indications of the initial test, a repeat test should be done after a week, as your body may begin to produce required amount pregnancy hormone is slightly later than in most other women. There is no point in taking a test before your period is missed, as it will still show a false negative result. If at least one of the two tests is positive, contact your gynecologist. If both tests are negative, but your doubts remain, also consult a doctor.
Any girl worries and worries if her menstruation does not start on time.
One half rejoices at the possible advance long-awaited pregnancy, and the other is upset if the birth of a child is not yet included in her life plans. When your period is delayed by a couple of days, it is not always advisable to do laboratory tests, so girls resort to using test strips.
These simple devices high accuracy Determine pregnancy at home.
How does a pregnancy test work?
The very first sign of successful fertilization is the production of human chorionic gonadotropin in the girl’s blood and urine. It is secreted by a woman’s body upon conception. It is with this hormone that the test reacts.
The part of the device that absorbs liquid contains a substance that interacts with the dye. When the hCG hormone is detected in the liquid, the dye is released and two stripes appear. If human chorionic gonadotropin is not in the biomaterial, then there will be only one strip.
The first strip reagent is always released, regardless of hCG level. It will appear even if the device is immersed in plain water. The first strip is needed to show the suitability of the test.
Digital devices operate in the same way, only the test strip is built into the body and the result is displayed on the built-in display in the form of stripes, plus and minus, or even a smiley face.
How accurate is the result?
Manufacturers of pregnancy tests provide a guarantee of results from 95 to 100%. But the possibility of error still exists. To be sure of the results, it is best to do several tests with a difference of 2-3 days.
There are situations when the presence of interesting situation, but in fact it is not, or vice versa. There are several reasons for this.
A false negative result occurs in the following cases:
- drinking plenty of water before testing;
- heart or kidney disease;
- gestation period 1-2 weeks;
- pregnancy pathologies;
- the girl takes medications containing hormones;
- recent abortion or loss of a child.
A positive result in the absence of pregnancy occurs for the following reasons:
- urine for analysis is not fresh or testing is not carried out in the morning;
- diseases of the female genital organs;
- non-compliance with instructions for use;
- poor quality test;
- menopause
In order for the test result to be as correct as possible, be sure to check the integrity of the packaging, the expiration date of the device, carry out the procedure in the morning and at least 7 days after the planned date of the start of menstruation, and also repeat the process after 2-3 days.
How to use a pregnancy test - detailed instructions
There are four types of pregnancy tests: inkjet, tablet (or test cassette), electronic and strip test (or test strip).
All types of tests have different ways applications.
Jet
Inkjet is a cassette containing special blue particles that react even to a tiny amount of human chorionic gonadotropin in a woman’s urine. Such devices are the most sensitive and accurate. Their sensitivity starts at 10 mIU/ml. The jet test is able to recognize that a girl will soon become a mother, even before a delay in menstruation occurs.
Another undoubted advantage of the inkjet device is its ease of use. To carry out the procedure, you do not need an additional container; you just need to place the device under a stream of urine. Thus, testing can be done anywhere, even at work, if you don’t want to wait until you get home.
Apply as follows:
- Remove the device from the sealed packaging.
- Remove the protective cap from it.
- Holding the handle, place the tip of the device under the stream of urine.
- Wait 5-10 seconds.
- Place the device horizontally, window up, and wait five minutes for the result. It is forbidden to check the results later than twenty minutes.
Tablet
The tablet consists of plastic container, pipettes and containers for biomaterial. The container has two windows. One is for urine, the second displays the result.
This device also has excellent sensitivity of 10-25 mIU/ml and detects pregnancy early, however, it is not very convenient to use, so it will not be possible to quickly carry out the procedure anywhere. It's easier to wait until you get home.
Instructions for use:
- open the package;
- take out the tablet and pipette;
- prepare urine for analysis in the container included in the kit;
- fill the pipette with biomaterial and drop 4 drops into the device window;
- Place the tablet on a flat surface, wait for results for at least one minute and no more than ten.
Electronic
An electronic one is a device that contains an ordinary test strip inside. But the result of the analysis is more reliable, since it takes into account the amount of not only hCG, but also luteinizing hormone. After liquid hits the strip, the electronics of the device analyzes all indicators and produces the most accurate result.
The sensitivity of electronic devices starts from 10 mIU/ml.
This test is as convenient as the inkjet test because it can be carried out without using additional details. Simply place the tip under the stream of urine.
Algorithm of actions:
- Open the package.
- Place the device under a stream of urine or lower it into a container with it for 5-10 seconds.
- Leave it for 3 minutes for analysis.
- Check out the result.
Strip test
The test strip is paper strip, soaked in a dye reagent. When it comes into contact with liquid, stripes appear on it. This device is most popular among women due to its low cost, but its sensitivity is 20-30 mIU/ml.
With its help, you can determine the presence of an interesting position only after the delay has occurred.
Guide to action:
- unpack and take out the test strip;
- collect urine in a sterile container;
- Immerse the test in it to the special mark for 5-10 seconds;
- take it out and place it on a dry surface;
- After 2-5 minutes, check the result.
It is important to remember that each device has its own instructions for use and it is best to carry out the procedure by following the instructions in it.
There are dozens of manufacturing companies: Attest, Clearblue plus and digital, Milatest, Vestel, Ansver, Frautest and many others.
What to do to make the result as accurate as possible - the doctor advises
In order for testing to show the most accurate result, a number of requirements must be met:
- Testing should be done immediately after waking up, using the first morning urine. During the night, many different substances accumulate in it, including hormones. Therefore, the concentration of hCG in the biomaterial in the morning is the highest compared to other times of the day.
- The container in which urine is collected must be sterile. You can use a test bottle purchased at a pharmacy.
- The procedure must be carried out strictly according to the instructions. Do not keep the device in liquid or keep it there for less than the prescribed time. The device should only be immersed to the special mark, otherwise it will get wet and become faulty.
- Since the chorion appears only on the 7th day after conception, it is recommended to do the procedure no earlier than this period. It’s best to wait until your period is late and start testing. The result of the test conducted on the 7th day of the delay will be more reliable, since by this time there is already a sufficient amount of hCG in the body.
- The package must be opened immediately before the procedure. The test is specially stored in sealed packaging to avoid contact with moisture and other substances. Therefore, when purchasing a test at a pharmacy, be sure to pay attention to the integrity of the packaging.
- After the dough has come into contact with the liquid, do not turn it vertically with the receiving side up, but place it horizontally on a clean, flat surface. If the device has a cap, it is better to put it on to protect it from dust, as it can affect the result.
- Be sure to check the expiration date when purchasing. If the deadline has expired, then the test results should not be trusted.
- If the test is carried out in the evening, then you should not drink a lot of liquid during the day.
How to accurately determine pregnancy - doctor’s commentary in this video:
Conclusion
Instructions for use are always included with each test. Testing must be carried out strictly following it. If you follow the requirements specified in it and the advice of doctors regarding the preparation and timing of the procedure, the result will be as reliable as possible.
It should be remembered that in addition to pregnancy, there are other factors that provoke a positive result. Moreover, one stripe does not always mean that the girl is not expecting a child. In any case, if you experience discomfort or your periods do not come on time, it is best to have a qualified specialist help you understand the reasons.