If your period is regular and you are more than 30 days pregnant, i.e. if your period is more than 3-10 days after your period, a pregnancy test (early pregnancy test) will usually show a second red double bar. Pregnancy test is to test the human chorionic gonadotropin in the urine, the longer the pregnancy, the higher the concentration of human chorionic gonadotropin in the urine, the higher the chances of a second red. If you want to know whether you are pregnant, the menstrual period is more than 3 to 10 days after the wrong test, the use of pregnancy tests, pregnancy tests (early pregnancy test strips) will generally appear second red double bar phenomenon, it is recommended that you can go to the hospital to take a blood test of HCG, to be able to diagnose whether the pregnancy. If you have regular menstruation, it is recommended that you go to the hospital and have your doctor guide you through the relevant tests to determine whether you are pregnant.