Ectopic pregnancies are not detected with pregnancy tests, although 80% of ectopic pregnancies have a poorly developed gestational sac, and the patient may have a persistent weak positive test with a pregnancy test. However, 20% of patients with intrauterine pregnancy have poor development of the gestational sac, there is the possibility of pre-miscarriage or biochemical pregnancy, the use of the test paper test can also appear persistent weak positive. In 20% of ectopic pregnancies, the motility is so good that a pregnancy test can detect a strong positive very early. Therefore, there is no way to determine whether the patient is pregnant intrauterine or extrauterine using a pregnancy test, and it is necessary to dynamically observe the changes in blood chorionic gonadotropin, progesterone, and ultrasound in order to accurately determine whether the pregnancy is intrauterine or extrauterine.