Pregnancy tests and nucleic acid test strips are not the same, the former is used to detect whether pregnancy, nucleic acid test strips generally refers to nucleic acid antigen detection reagents, is used as a new coronavirus detection. 1. Pregnancy test: Pregnancy test is a tool to detect whether a woman is pregnant by detecting the concentration of human chorionic gonadotropin in human urine, mainly utilizing the principle of double-antibody sandwich qualitative or semi-quantitative detection. Secondly, the accuracy of the test is about 85% to 95%. If you are not pregnant, only a control line will appear on the pregnancy test; if you are pregnant, both the control line and the test line will be colored; if it is invalid, no control line will appear. 2. Nucleic acid antigen detection reagent: can be used as a new coronavirus detection, or direct detection of viruses in the body, the principle is to use the existing antibody to detect the antigen of the virus, so that the virus is displayed. Generally, the specificity can reach 99%, if it is positive, C and T show red or purple bands; if it is negative, T does not show bands; if it is invalid, C does not show, regardless of whether the “T” shows. To summarize, the test taker should choose the appropriate test according to his/her own needs and go to the hospital in time if the result is abnormal.