Ectopic pregnancy HCG dropped on its own may be fine if it is a tubal pregnancy miscarriage type, where the pregnancy stops developing and absorbs, but cannot be fine if it is an incomplete miscarriage. Ectopic pregnancy HCG dropped by itself may be ectopic pregnancy abortion, such as tubal pudendal or umbrella pregnancy, this kind of pregnancy is the fertilized egg planted in the mucosal folds of the fallopian tube, can not be normal growth and development of the formation of fallopian tube pregnancy miscarriage type, the HCG value of the appearance of their own decline, this may be after observation without surgical treatment. If the fallopian tube pot belly or umbrella pregnancy, follicle stripping is incomplete, pregnancy products partially discharged to the abdominal cavity, while some of them are attached to the fallopian tube wall, this situation trophoblast cells will continue to erode the fallopian tube wall, resulting in recurrent bleeding, belong to the incomplete miscarriage, although the HCG will fall, but the downward trend of the slow trend, can not be called well, and need to be treated. Ectopic pregnancy HCG although their own drop, but can not rely solely on this indicator to determine the condition, it is recommended that timely consultation.