There is no clinical statement on whether it is normal to be pregnant with a single bar on a pregnancy test, which may be due to premature measurement, expiration of the test, and so on. Usually women can use the pregnancy test 14 days after intercourse or 1 week after menstruation, if the measurement is too early due to the body of human chorionic gonadotropin is not obviously elevated, may affect the test results. The expiration date of the pregnancy test stick may also affect the test result, and there is a pregnancy test stick with one bar. Women need to repeat the measurement after using the pregnancy test and read the instructions carefully before taking the test to make clear the expiration date of the test, so as to ensure the accuracy of the measurement. If you are still unsure, you can also consult a doctor about 10 days after your period to check the level of human chorionic gonadotropin in your urine to determine pregnancy. Women are advised to use the pregnancy test correctly and to take the test in a reasonable way so as not to affect the result. After pregnancy, women also need to pay more attention to their own care, so as not to affect the development of the fetus.