The results of using a pregnancy test when you are about to have your period to see if you are pregnant may not always be accurate. Since pregnancy test is determined by detecting HCG in the urine, it can only be detected when the concentration is relatively high; at the same time, the duration of pregnancy for some women may be shorter than the time of menopause, so the test results are usually a bit inaccurate when you are about to have your period. It is generally recommended that women postpone menstruation for about 1 week to use a pregnancy test stick to detect morning urine, when the results are relatively accurate. If women have reproductive needs, it is also recommended that they go to the gynecology department of a regular hospital to improve blood HCG, progesterone, ultrasound and other related tests to determine whether the pregnancy is intrauterine.