The diagnosis of ectopic pregnancy in clinical practice is not determined by the result of a single blood HCG test. The same ectopic pregnancy, for example, some people have a cervical pregnancy and their blood HCG can reach tens of thousands, while others have a tubal pregnancy and their blood HCG is only 2000 U/L or 1000 U/L. Therefore, clinically, the possibility of an ectopic pregnancy cannot be determined by the amount of a single ectopic pregnancy, but by whether the value doubles and rises every other day. Ectopic pregnancy does not double up if the blood HCG is drawn and checked again at 1 day interval in clinical practice. If a gestational sac is not visible in the uterus through ultrasound, it is often seen outside the uterus. Generally, if a gestational sac is seen in the horn of the uterus or in the cervix, ectopic pregnancy is clinically diagnosed and immediate treatment is recommended.