The examination for an ectopic pregnancy is divided into two steps, the first step is to confirm whether one is pregnant. Then, pregnancy can be detected either by a pregnancy test strip or the most accurate method, which is through a blood test. Once pregnancy is confirmed, the second step involves an ultrasound examination. A blood test only indicates whether or not one is pregnant, but an ultrasound can specifically determine whether it is an intrauterine pregnancy or an ectopic pregnancy. If it is an intrauterine pregnancy, the pregnancy can simply continue. If it is an ectopic pregnancy, surgical or medical treatment is necessary. On an ultrasound, an ectopic pregnancy is indicated by the absence of a gestational sac within the uterine cavity, but a gestational sac or mass is found outside the uterus, which confirms the diagnosis of an ectopic pregnancy.