The accuracy of pregnancy test paper can reach about 80%-90% at present. If a female patient is not sure about her pregnancy, she can choose to buy pregnancy test paper or pregnancy test stick from a regular pharmacy one week after her menstruation has stopped, and the accuracy of the test is relatively high. If two red bars appear during the test, it means that you are pregnant and you need to undergo an ultrasound to determine whether the pregnancy is intrauterine or ectopic, so as to rule out ectopic pregnancy in time. If a red line appears during the test, this is a negative result. To rule out false negatives, a pregnancy test should be repeated in a few days to clearly rule out the diagnosis of pregnancy. If necessary, you can also go to the Obstetrics and Gynecology Department of the hospital and have blood-related tests and a urine pregnancy test performed to confirm the diagnosis of pregnancy.