A pregnancy test with a single swoosh and a single line is usually not pregnant. The pregnancy tests available on the market usually indicate pregnancy by showing two lines clearly after 1 minute of testing, and non-pregnancy by showing only one control line after 3 minutes. However, the accuracy of pregnancy tests is around 85%-95%, which means that there is a certain probability that the test results will not be accurate. When the HCG concentration is too low in early pregnancy, the pregnancy test will not be able to detect the pregnancy result. Women who suspect that they are pregnant can be diagnosed under the guidance of a doctor by combining menstrual history, clinical manifestations, blood HCG and ultrasound results. When a woman of childbearing age with normal menstrual cycles and a history of sexual intercourse experiences menopause, the possibility of early pregnancy should be considered first. Some women may experience early pregnancy reactions such as loss of appetite, acid cravings, partiality for food, nausea and vomiting in the morning at around 6 weeks after menopause. If pregnancy is confirmed, regular checkups are recommended.