FDA Certificate Test Paper for Early Pregnancy
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In general, there are two test results of early pregnancy test paper: a color band in the control area of the test paper, which is negative, indicating that there is no pregnancy;
On the other hand, if there is a clear ribbon in the test area, it is positive, indicating that it is already pregnant.
The test has advantages of fast, convenient, sensitive and specific.
Early pregnancy test paper can only serve as a kind of initial screening test, must not be too reliable, because use early pregnancy test paper test will appear false positive or false negative.
Detection principle
Simple said, shortly after fertilization, placental trophoblastic cells secrete a human chorionic gonadotropin (HCG) is a glycoprotein produced by pregnant women, in the placenta, like hormone exist in large Numbers in the urine of pregnant women, from the eduction in urine by glomeruli.
In the urine of non-pregnant women, HCG was not included.
HCG colloidal gold method was used to detect the concentration of HCG in urine to determine whether a woman was pregnant.
The test paper is a reliable indicator to assist clinical judgment of pregnancy.
Method of use
step
1. Slit the aluminum foil bag and take out the pre-pregnancy test paper;
2. Operate according to the model (the urine is not directly soaked in the observation area)
Type: immerse the white end of the test paper in the urine (the liquid level should not exceed the horizontal line) for 10 seconds
Card type: drop the urine directly into the sample hole, about 2-3 drops (urine may not be directly soaked in the observation area);
Pen type: pour urine directly into the sample area and hold for 5~10 seconds.
3. Lay the test paper on for 1 minute, waiting for the red stripe to appear;
4. Observe the results within 5 minutes and the interpretation will not be valid after 5 minutes
Judgment way
Positive: two red strips appear.
One is in the control area C and the other is in the test area T, indicating that it is pregnant.
Negative: a red stripe appears in the control area C. No red strips appear in the test area, indicating that there is no pregnancy.
Invalid: 5 minutes in the control zone C no red stripe appears, indicating that the test failed or the test paper has failed.
Analysis of measurement errors
1. Time of detection.
HCG typically occurs in urine only a few days after the fertilized egg, and a certain amount is needed to be detected.
Therefore, the women who normally menstruate normally need to be delayed after menstruation may detect HCG in the urine.
Women with long periods or abnormal ovulation may not be able to detect them until they are 40 to 44 days off.
2. Diluted urine.
If drinking too much water dilutes the urine, it can lead to false negative results.
3, morning and evening experiments may have some effect on the results.
Morning urine usually has the highest HCG value, so many instructions suggest a morning check, but it's not absolute.
4. Pay attention to the length of urine immersion test paper.
Sometimes the length of the urine immersion test paper may make the test results difficult to judge.
5. Don't judge whether you are pregnant by testing results before you have a pregnancy.
HCG can be consistently positive for a long period after termination of pregnancy (after childbirth, spontaneous abortion and induced abortion).
Some diseases and drugs may result in false positives.
Some tumor cells, such as hydatid, velvet, bronchial, and kidney, also secrete HCG.
7. Do not use expired test paper.
Because the chemical reagent is too long, it will lose its utility, so pay attention to the production date when you buy it.
8. Don't use the wet test paper.
9. To get the correct results, it is best to do early pregnancy test at two weeks' delay.
If the test results are negative, you should do it again after 1 week.
In the case of pregnancy, the results are not allowed, because HCG can continue to be positive for a long period of time after termination of pregnancy (after childbirth, spontaneous abortion and induced abortion).
Some diseases and drugs may result in false positive tests, such as taking blood in the urine or taking some fertility drugs.
Some tumor cells such as hydatid, velvet, bronchial and kidney cancer can also promote the secretion of HCG.
considerations
1. This product is used in vitro.
2. After opening the aluminum plastic bag, please do not put the test paper in the air for a long time to avoid the failure of the moisture.
3. When the concentration of HCG is high, the detection line color may be shallow, which is normal.
4. A morning urine test can be collected after 48 hours if the detected suspect is suspected to have a pregnancy and the test results are negative.
5. Some endocrine diseases, tumors (including hydatid, chorionic, bronchial, renal, endometrial hyperplasia) and other patients may have positive results due to high levels of HCG in the urine.
6. Suspected uterine ectopia and abnormal pregnancy should be diagnosed with other methods.
7. It is not suitable to drink and drink plenty of water before testing, so as to avoid diluting the contents of HCG in the urine, which will affect the test results.
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Early pregnancy test paper is a product designed to detect and assist the diagnosis of women's early pregnancy.
In general, there are two test results of early pregnancy test paper: a color band in the control area of the test paper, which is negative, indicating that there is no pregnancy;
On the other hand, if there is a clear ribbon in the test area, it is positive, indicating that it is already pregnant.
The test has advantages of fast, convenient, sensitive and specific.
Early pregnancy test paper can only serve as a kind of initial screening test, must not be too reliable, because use early pregnancy test paper test will appear false positive or false negative.
Detection principle
Simple said, shortly after fertilization, placental trophoblastic cells secrete a human chorionic gonadotropin (HCG) is a glycoprotein produced by pregnant women, in the placenta, like hormone exist in large Numbers in the urine of pregnant women, from the eduction in urine by glomeruli.
In the urine of non-pregnant women, HCG was not included.
HCG colloidal gold method was used to detect the concentration of HCG in urine to determine whether a woman was pregnant.
The test paper is a reliable indicator to assist clinical judgment of pregnancy.
Method of use
step
1. Slit the aluminum foil bag and take out the pre-pregnancy test paper;
2. Operate according to the model (the urine is not directly soaked in the observation area)
Type: immerse the white end of the test paper in the urine (the liquid level should not exceed the horizontal line) for 10 seconds
Card type: drop the urine directly into the sample hole, about 2-3 drops (urine may not be directly soaked in the observation area);
Pen type: pour urine directly into the sample area and hold for 5~10 seconds.
3. Lay the test paper on for 1 minute, waiting for the red stripe to appear;
4. Observe the results within 5 minutes and the interpretation will not be valid after 5 minutes
Judgment way
Positive: two red strips appear.
One is in the control area C and the other is in the test area T, indicating that it is pregnant.
Negative: a red stripe appears in the control area C. No red strips appear in the test area, indicating that there is no pregnancy.
Invalid: 5 minutes in the control zone C no red stripe appears, indicating that the test failed or the test paper has failed.
Analysis of measurement errors
1. Time of detection.
HCG typically occurs in urine only a few days after the fertilized egg, and a certain amount is needed to be detected.
Therefore, the women who normally menstruate normally need to be delayed after menstruation may detect HCG in the urine.
Women with long periods or abnormal ovulation may not be able to detect them until they are 40 to 44 days off.
2. Diluted urine.
If drinking too much water dilutes the urine, it can lead to false negative results.
3, morning and evening experiments may have some effect on the results.
Morning urine usually has the highest HCG value, so many instructions suggest a morning check, but it's not absolute.
4. Pay attention to the length of urine immersion test paper.
Sometimes the length of the urine immersion test paper may make the test results difficult to judge.
5. Don't judge whether you are pregnant by testing results before you have a pregnancy.
HCG can be consistently positive for a long period after termination of pregnancy (after childbirth, spontaneous abortion and induced abortion).
Some diseases and drugs may result in false positives.
Some tumor cells, such as hydatid, velvet, bronchial, and kidney, also secrete HCG.
7. Do not use expired test paper.
Because the chemical reagent is too long, it will lose its utility, so pay attention to the production date when you buy it.
8. Don't use the wet test paper.
9. To get the correct results, it is best to do early pregnancy test at two weeks' delay.
If the test results are negative, you should do it again after 1 week.
In the case of pregnancy, the results are not allowed, because HCG can continue to be positive for a long period of time after termination of pregnancy (after childbirth, spontaneous abortion and induced abortion).
Some diseases and drugs may result in false positive tests, such as taking blood in the urine or taking some fertility drugs.
Some tumor cells such as hydatid, velvet, bronchial and kidney cancer can also promote the secretion of HCG.
considerations
1. This product is used in vitro.
2. After opening the aluminum plastic bag, please do not put the test paper in the air for a long time to avoid the failure of the moisture.
3. When the concentration of HCG is high, the detection line color may be shallow, which is normal.
4. A morning urine test can be collected after 48 hours if the detected suspect is suspected to have a pregnancy and the test results are negative.
5. Some endocrine diseases, tumors (including hydatid, chorionic, bronchial, renal, endometrial hyperplasia) and other patients may have positive results due to high levels of HCG in the urine.
6. Suspected uterine ectopia and abnormal pregnancy should be diagnosed with other methods.
7. It is not suitable to drink and drink plenty of water before testing, so as to avoid diluting the contents of HCG in the urine, which will affect the test results.
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