A two-bar pregnancy test indicates a high probability of pregnancy, as the pregnancy test has an accuracy rate of about 90%. There is also the possibility of a false positive, which means that the pregnancy test may be inaccurate, but the probability of this is probably 5-10%. There are several types of pregnancy, such as a recent pregnancy, a biochemical pregnancy, a spontaneous miscarriage, or an ectopic pregnancy. If a woman’s period has been delayed for more than a week, it is best to first go to the hospital for a blood test for HCG and progesterone to confirm the pregnancy. If the woman also has abnormal symptoms, such as severe pain in the stomach or bleeding from the vagina, it is best to confirm intrauterine pregnancy with ultrasound to rule out ectopic pregnancy. If the HCG shows pregnancy and the ultrasound does not confirm or rule out ectopic pregnancy, and there are no symptoms at the moment, you can go back for a repeat ultrasound and blood test at another week interval.