Principle of early pregnancy test paper
Pregnancy test paper is a tool to detect whether a woman is pregnant. The principle is based on the presence of human chorionic gonadotropin (hCG). hCG is a hormone produced by a fertilized egg and will continue to increase after pregnancy. Pregnancy test strips determine whether you are pregnant by detecting the hCG content in urine.
The principle of pregnancy test paper is based on immunology. The antibodies on the test strip bind to hCG, causing a color-changing reaction. Specifically, the antibodies on the test paper will combine with hCG to form a brown particle. When the urine is immersed in the test paper, the urine will penetrate upward. When it comes into contact with the antibodies on the test paper, the antibodies will combine with hCG to form particles. This process is a chemical reaction that causes a color change on the test paper.
How to use test strips
Using a pregnancy test strip is very simple. First, you need to prepare a test strip and some urine. For the best test results, do the test in the morning when you first urinate. After urinating, you need to dip the absorbent end of the test strip into the urine. Place the test strip on a level surface without tilting it. Then, you need to wait a few minutes for the test strip to fully react. Different brands of test strips have different reaction times, usually 1-3 minutes. Do not move the test strip during the reaction time. After the time is up, follow the instructions on the test paper to interpret the results.
Notes
There are some important things to note when using pregnancy test strips. First, if possible, take the test on the first day of your missed period after pregnancy. If your pregnancy is longer than two weeks, you may get a false negative result. Secondly, the test strips should be stored in a cool, dry place and not exposed to sunlight. The validity period of the test paper also needs to be paid attention to, as the accuracy of expired test paper will be reduced. Finally, if there is any doubt or uncertainty about the test results, it is recommended to go to the hospital for confirmation.
Interpretation of test results
The results of early pregnancy test paper can be divided into two types: positive and negative. If two lines appear on the test paper, then that means it is a positive result. A negative result means that there is only a line on the test strip, indicating that you are not pregnant. Different brands of test strips interpret results differently, so you must read the instructions carefully. In addition, the sensitivity of test strips also varies from brand to brand. Some test strips can detect very low concentrations of hCG, while others may take several days after pregnancy to have sufficient hCG concentration to detect.
Summary
Using a pregnancy test is a convenient way to check if you are pregnant. It works based on hCG testing, which can confirm pregnancy through urine. When using test paper, you need to follow a series of usage methods and precautions, and interpret the results according to the instructions on the test paper. Pregnancy test strips are a very reliable pregnancy test tool, but if the test results are unclear or questionable, it is recommended to go to the hospital for confirmation.
