What is the difference between negative and positive

Modern women usually use test strips to check whether they are pregnant during the pregnancy preparation period. After each intercourse, they use early pregnancy test strips to check whether they are pregnant. Many women know how to use early pregnancy test strips and know the difference between a negative and a positive result. However, some women don't know it when they use it for the first time. So what is the difference between a negative and a positive pregnancy test?

The difference between a negative and positive pregnancy test

Under normal circumstances, there are two kinds of test results of early pregnancy test paper: put urine into the test hole on the pregnancy test paper, if there is a line of ink in the contrast area of ​​the pregnancy test paper (some pregnancy test paper are bright red, some pregnancy test paper are dark blue), the expression is negative, indicating that you are not pregnant; on the contrary, if there is an obvious ink line in the test area, the expression is positive, indicating that you are already pregnant. This type of test has the advantages of being rapid, convenient, flexible and highly specific. However, early pregnancy test strips can only be used as a preliminary screening test, because pregnancy test strips can sometimes result in positive or false negative results.

Which method is the most accurate for detecting pregnancy?

The way for women to check whether they are pregnant is to use early pregnancy test strips, but its accuracy is questionable and there will be errors. If women want to get the most accurate answer, it is best to go to the hospital for examination. So, which method is the most accurate to test female pregnancy? B-ultrasound and blood HCG test are the most reliable.

1. Type B ultrasound examination: Using type B ultrasound to check whether the pregnancy is confirmed is convenient and accurate, and the diagnosis can usually be made around 5 weeks of pregnancy. Type B ultrasound can not only diagnose normal pregnancy, but also diagnose ectopic pregnancy.

2. Lutein copper test: For women whose menstrual period has expired and who are suspected of early pregnancy, 10-20 mg of lutein copper can be injected intramuscularly every day for 3-5 days. If vaginal bleeding occurs within 3-7 days after stopping the medication, pregnancy can be ruled out. If no vaginal bleeding occurs within 7 days after the injection, the possibility of early pregnancy is very high.

3. Blood HCG test: After a woman becomes pregnant, an increase in β-HCG in the blood can be detected from the 9th to 11th day after fertilization. The increase is rapid in the first 8 weeks of pregnancy to maintain the pregnancy. After about 8 weeks of pregnancy, HCG levels gradually decrease until they are relatively stable at about 20 weeks. It can be said that although the urine HCG test is simple and convenient, it has a relatively large error, while the blood test HCG is more accurate, has a smaller error, and on-site sampling can be done earlier. Therefore, it is generally recommended that women go to the hospital for a blood test for HCH testing.

The article explains in detail the difference between a negative and positive pregnancy test, and also introduces in detail which method is the most accurate for detecting pregnancy. As a woman who is preparing to get pregnant, you'd better understand how to use early pregnancy test strips and the difference between a negative and positive pregnancy test. At the same time, you also need to know which method of pregnancy detection is the most accurate, so that you can more accurately determine whether you are pregnant.