For regular menstrual cycles (once every 28 to 30 days), you can use an early pregnancy test when your period is about seven days late. If the test reveals two strong positive bars on the early pregnancy test paper, it means that you are pregnant. If a woman usually has irregular periods, she can use the date of intercourse to start projecting, and push back about 14 days from the day of intercourse to check whether she is pregnant with an early pregnancy test; or she can have a blood test for human chorionic gonadotropin about 10 days after intercourse, which is also the earliest way to determine whether she is pregnant. If a pregnancy test reveals pregnancy or a blood test reveals pregnancy, it is recommended that an ultrasound be performed around 42 days after conception to determine whether the pregnancy is intrauterine or ectopic. It is also important for women to note that a test paper test may give a false positive, so they need to seek medical clarification.