A pregnancy test that is a single bar when your period has been delayed for 8 days usually means it is negative and you are not pregnant, but it does not rule out special circumstances. Normally, it is normal for a woman’s period to be delayed or advanced by one week. If a woman has a normal sex life, and did not do contraception, there is a delay in menstruation for 8 days, you need to be highly suspicious of the possibility of pregnancy, but at this time a bar on the pregnancy test can only mean that there is no temporary detection of pregnancy, do not rule out the detection of time is too early related to the time to wait for a week, go to the hospital for a blood test. Of course, some women’s menstruation delayed 8 days, the reason why the pregnancy test is a bar, may be related to the absence of pregnancy, for example, women have endocrine disorders caused by menstrual irregularities, there will be a delay in the phenomenon of menstruation. It is recommended that women should have good living and eating habits, and should go to the hospital for regular checkups to clarify their health status.