Antigen test strips cannot be used to detect pregnancy. Antigen test strips are based on the principle of antigen-antibody binding, whereby a sample is added to the test strip and specific binding of antigen and antibody occurs, resulting in a positive result. Clinical antigen test strips such as the new coronavirus antigen test strips are used. If you want to test for pregnancy, you need to use a pregnancy test stick, also known as human chorionic gonadotropin (HCG) test strips, which determines whether you are pregnant by measuring whether or not HCG levels are elevated in the urine of the test subject, which is different from antigen test strips in terms of the test object and principle, and you should not use antigen test strips to determine whether you are pregnant or not. If a woman needs to exclude the possibility of pregnancy, it is recommended to consult a doctor for standardized diagnosis and treatment.