The most common and convenient way for people to find out if they are pregnant is through the early pregnancy test. If you don’t use the early pregnancy test to find out if you are pregnant, you can also have a blood test for blood HCG to detect pregnancy. If blood is drawn, you will need to come to the hospital. Ultrasonography can also be used. Ultrasonography in early pregnancy can determine if the pregnancy is intrauterine, if it is normal, and can also rule out ectopic pregnancy, which is an extrauterine pregnancy. In addition, other trophoblastic diseases can be ruled out, such as trophoblastic disease, which is often referred to as hyperemesis gravidarum. Ultrasound is an important method for detecting early pregnancy, but it is a later diagnosis than the early pregnancy test and blood HCG.