Principle of pregnancy test paper
Chorionic gonadotropin is a special hormone secreted by pregnant women, which exists in urine and blood. The general pregnancy test is to judge whether you are pregnant or not through the reaction between one or more HCG antibodies in the device and the antigen in urine, commonly known as pregnancy test stick, pregnancy test piece or pregnancy test card. It can be detected in urine about 14 days after sexual intercourse.
How accurate is it?
The accuracy of pregnancy test is related to the dilution degree of urine, and it is best to use morning urine test in the morning. Morning urine concentration is relatively high, which is the most sensitive to detection. However, it should be noted that the accuracy and sensitivity of this test method are related to the hormone level of the individual and the quality of the test reagent. Some people's hormone levels rise rapidly and can be detected quickly. Some people need 7 8 days after menopause to detect whether they are pregnant. Therefore, if the first test after menopause is negative, it can be tested again after 3 ~ 4 days. If you want to accurately judge whether you are pregnant, you must go to a regular hospital for examination.