The sooner a pregnancy is detected, the better for a woman and a child. At home, this can be determined in the early stages - at 2-3 weeks. For this, a pregnancy test “Bi-Shur-S” can be used. Reviews indicate its effectiveness. In addition, it is inexpensive and is in every pharmacy. You will learn about his work and terms of use from the article.
Bit of history
Humanity has always looked for methods to determine pregnancy. Because of ignorance, many difficulties arose. They began to look for ways a long time ago, but only in the Middle Ages did a scientific approach begin to be used. For a long time, pregnancy was determined by the consistency of urine, its smell and transparency. A pale lemon color, almost transparent with foam on top, testified to conception.
Later they began to moisten a piece of matter with urine and set it on fire. If a woman liked the smell, then there is no pregnancy. Progress came only in the middle of the 20th century, when antibodies were isolated in the blood using radioimmunoassay. The analytical method revealed the presence of chorionic gonadotropin - a hormone that is secreted by the placenta of a pregnant woman. It is called hCG.
For 10 years, the method was studied and improved. After that, a test was created that established the level of hCG in 2 hours. Such a tool for home use began to be sold in the mid-70s in the United States. The test became widespread in 1985, when Clearblue was released by Swiss entrepreneurs. But he had to tinker with. After 3 years, the company began to sell the usual test strips.
Now this is a common method for determining whether there was a conception. Pregnancy Test "Bi-Shur-S" - a modern tool for women. According to reviews, it is appreciated for its convenience, compactness and affordable price.
Features
Pregnancy Test Bee Sure S in contact with urine responds to HKH hormone. It accumulates in the blood and urine of a woman if fertilization has occurred. The sensitivity of the Bi-Shur-S pregnancy test is 20 mIU / ml. Usually, this concentration of the hormone in the urine appears on the 7th day after conception and rises every day. Therefore, it is advisable to perform an express analysis no earlier than on the first day of a delay in menstruation.
According to reviews, the pregnancy test "Bi-Shur-S" shows the result with an accuracy of 99%. Inaccuracies rarely occur. What does a positive pregnancy test look like? He shows 2 strips. In this case, the second may be pale, since the presence of hCG is low. The cost of the test is from 20 rubles.
Thanks to this method of testing, every woman can determine whether conception has occurred or not. The Bi-Shur-S test usually shows a reliable result. But if in doubt, even after testing, you can consult a doctor. Using modern equipment, a specialist will provide accurate information.
Advantages and disadvantages
The Bee Sure S pregnancy test has the following advantages:
- Simple and easy to use.
- Provides quick results.
- High accuracy.
- Affordable price.
The main thing is that you need to perform testing correctly. According to reviews, the pregnancy test "Bi-Shur-S" shows a reliable result only with a delay of menstruation. He has no other shortcomings. The description of the Bi-Shur-S test is presented below.
What is it like?
"Bi-Shur-S" is the most common type of pregnancy test, as it is considered cheap. It is impregnated with a reagent that sets the hCG value in the urine.
There is a risk of errors, because you can lower the indicator below the indicated mark or leave it for a long time in the urine. It is important to follow the instructions. Reliability arises from the first day of the delay of menstruation.
Act
What is the principle of action of the pregnancy test "Bi-Shur-S"? It establishes the presence of chorionic gonadotropin in the urine. He has 2 strips - control and diagnostic. The first works when any moisture gets on the surface.
The diagnostic strip has special components (antibodies) that respond to hCG in the urine. Upon contact of chorionic gonadotropin with labeled antibodies, the second strip turns red. What a positive pregnancy test looks like is shown in the photo.
Acquisition
According to reviews, the pregnancy test "Bi-Shur-S" should be bought only in pharmacies. This will prevent the acquisition of fakes. Check the integrity of the packaging. The strip should be packed in dense cellophane. Often it is filled with air.
After the expiration date or the presence of packaging damage, you should not perform the test, as the result will still be incorrect. The products of this company are sensitive, so it will be possible to identify pregnancy more reliably with it.
Deadline
What day to do the pregnancy test "Bi-Shur-S"? It is advisable to do this on a 2 day delay of menstruation. For accuracy in the diagnosis in the early stages of the evening, on the eve of using the test, you should not eat fatty foods. You should also refuse sexual contact.
It is preferable to use a strip in the morning, taking the first urine. You need to do the study before eating. After eating, the answer will not be true. Only at the beginning of the day the hormone concentration is high, so the result is accurate.
Rules of Procedure
How to use a pregnancy test? After waking up, you need to go to the toilet. Urine should be collected in a container and the tip of the test strip should be lowered to the indicated mark in the liquid for a few seconds. Then it is laid horizontally.
These are all the rules on how to use a pregnancy test. The result is ready after 5 minutes. After 10 minutes it will be invalid. How to understand pregnancy on a test? Conception is confirmed by 2 stripes.
But it is important to consider that a positive result is shown in the absence of pregnancy. This is usually observed due to a malfunction in the hormonal system. For an accurate result, it is advisable after a test to visit a gynecologist who will examine the uterus. This will establish whether there is a pregnancy.
In some cases, in the early stages, if the gynecological examination is not indicative, an ultrasound examination or tests are prescribed. But even if the second strip is weakly visible, it is likely that pregnancy has occurred. You can additionally use a couple of tests from other manufacturers.
Sometimes the hormone is produced not on the 6th day after conception, but on 14-15. This period is characterized by the maximum concentration of chorionic gonadotropin. Therefore, with a negative result and the absence of menstruation, you need to wait a few days and perform the study again. This is the entire Bee Sure S.
Conception of conception
Pregnancy is determined by the menstrual cycle. Its characteristics depend on the hormonal system. The formation of the first phase occurs by estrogen. This hormone helps the uterus prepare for conception. With his control, the endometrium appears. It covers the uterine body. Due to the gradual increase, several layers are provided.
Even estrogen leads to the production of follicle-stimulating hormone. It acts on the work of the ovaries. In each of them there are eggs that take part in conception. With the formation of follicle-stimulating hormone, one of the germ cells is activated. It passes into the shell of the ovary. So the follicle appears.
Follicular neoplasm interacts with luteinizing hormone. Due to its influence, the neoplasm shell bursts. The egg leaves the ovary. This phenomenon is called the ovulatory phase.
During ovulation, the couple increases the chance of conception. This process involves the penetration of sperm into the uterine cavity. They take part in fertilization. From the fusion of germ cells, a zygote is formed. Cystoblast passes into the uterine body. The zygote attaches to the wall of the organ and leads to the appearance of chorion. Only a pregnant woman has this hormone. It is detected using tesa and a blood test for hormones. The combined use of both methods allows us to establish conception.
What do the results mean?
When using the test, the following results appear:
- Lack of stripes. If everything is done correctly, but there is not a single strip, then the product is defective.
- One strip. This confirms the absence of pregnancy.
- Two bright stripes. This result indicates pregnancy.
- One is bright and the other is pale. This result appears with a dubious positive result. Probably, pregnancy has come, but the concentration of hCG is low. In this case, the analysis is better to repeat after a few days or to do an ultrasound.
Positive result
The presence of two distinct stripes confirms pregnancy. This happens in the presence of the hCG hormone. Additional signs of pregnancy include the following:
- Monthly periods are delayed for 3 or more days.
- The mammary glands are enlarged.
- The rectal temperature is increased to 37.1–37.3 degrees.
- Morning sickness.
- Mood swings.
- Frequent urination.
There may be such a situation that the second strip is poorly visible, but has blurry contours. The reason is the low concentration of hCG, you need to perform a secondary diagnosis after a few days. But usually this problem appears after the expiration date of the product or in violation of storage rules.
False positive result
This is the case when the test gives two cavities in the absence of pregnancy. Sometimes the dye appears from the conjugate before the antibody-hCG dye reaches the reaction zones. So there are vague spots. Such a result is considered false positive. But such situations arise very rarely.
A barely noticeable second strip is visible if the test is overexposed, that is, look at the result after 10 minutes or more. This line appears due to the evaporation of water from the surface of the dough. Thus, conjugates releasing the dye are destroyed. Since not all women follow the instructions and do not correctly interpret the answer, doctors do not trust this diagnosis much.
A false-positive result appears from taking special medications, impaired renal function or due to the large amount of fluid drunk. Often, the result is evidence of a trophoblastic tumor. Some gynecological ailments can lead to an increase in chorionic gonadotropin. To exclude them after a positive result, you should visit a gynecologist.
If hCG was administered to maintain the luteal phase or induce ovulation, traces of this hormone remain for 10 days after the medication. Therefore, the test shows a false positive result.
Test falsity
There are situations when these products provide a false negative answer. This is more common. The false negativity of the test appears when the study is performed early or when its sensitivity is low. If there is a risk of miscarriage, chorionic gonadotropin is not produced very actively, as with a normally developing pregnancy.
The main causes of a false positive test include:
- Chemical pregnancy. A fetal egg is present, but it is not fixed in the endometrium, which is why the embryo quickly dies. The problem appears with fibroids, scars in the uterus, congenital malformations of the childbearing organ, low progesterone.
- Ectopic pregnancy. Appears when the embryo does not pass into the uterus, but remains in the fallopian tubes. It is fixed on the ovaries or abdominal mucosa. This manifests itself in the form of sharp pain in the lower abdomen, lower back, vaginal discharge of blood, fainting. With the intensification of these symptoms, an ambulance is needed.
- Miscarriages, abortions, first 2 months after giving birth.
- Infectious diseases of the urinary tract, cysts, ovarian cancer, disorders of the pituitary gland.
- Reception of hormonal, narcotic, antihistamines, anticonvulsants.
- Trophoblastic tumors.
Another false negative result appears with prolonged use of diuretics, chronic ailments of the heart, kidneys, blood vessels, endocrine disorders, the threat of miscarriage. Alcohol, nicotine, antibacterial agents, drugs for emergency concentration do not affect the test results.
In order for the answer to be reliable, urine must be collected in sterile containers. All manufacturer's instructions must be followed. Before buying, you should study the expiration date. According to reviews, the test "Bi-Shur-S" in most cases shows the result reliably.
It is much better to detect pregnancy as early as possible. This will allow you to be more attentive to your health, to prevent threats. Just the products of Bi-Shur-S will perfectly help in this. The main thing is to follow the instructions from the manufacturer during the procedure.
Thus, in any situation, the test will help not to go to the doctor with a slight delay. First, you can perform a diagnosis at home and only then consult a doctor to clarify the results.