If a woman who has a normal sex life suddenly has a delayed or absent menstrual period, it is usually considered to be caused by pregnancy, in which case she can use early pregnancy test paper to test whether she is pregnant. At this stage, there are more kinds of early pregnancy test strips, such as David, Akcome, Blue Dream, Conagra, Xiuer and other brands. However, in general, Blue Dream’s early pregnancy test paper is better, it has a series of advantages such as high stability, accurate test results and low cost. At present, in addition to the early pregnancy test paper, there are also early pregnancy sticks and other supplies to test for pregnancy on their own, and the testing principles of early pregnancy sticks and early pregnancy test paper are actually the same. At this stage, Blue Dream only has early pregnancy test strips but not early pregnancy sticks, and for early pregnancy sticks, you can use the David series, which also has a very high accuracy rate. However, no matter which early pregnancy test is used, it is best to use the first urine in the morning to test, the depth of urine should not exceed the standard line of the early pregnancy test, and the result should be checked within 3-5 minutes. There are also very strict requirements for the timing of the test, if the period is just 2-3 days beyond the normal cycle, then it may not be tested regardless of which test strip is used. It must be used only when the period is more than 7 days past the cycle, because it is at this time that the concentration of HCG in the urine can reach the concentration for testing. Testing for pregnancy with early pregnancy test strips is only a preliminary screening test and therefore subject to a certain degree of error. In the case of two red bars in the urine of the early pregnancy test, it is necessary to go to the hospital to have a blood HCG test to confirm the diagnosis.