The time to embryo resorption after conservative treatment of ectopic pregnancy has not been clearly reported, and studies have shown that the time to embryo resorption is related to the size of the ectopic pregnancy mass and blood HCG levels. Fertilized egg deposited outside the uterine body cavity is called ectopic pregnancy, customarily referred to as ectopic pregnancy. Ectopic pregnancies are most common in tubal pregnancies. Ectopic pregnancy masses mainly contain clots and chorionic villi, the body itself has the function of removing foreign bodies, can be wrapped through the white blood cells, phagocytosis, mechanization caused by clots and chorionic villi absorption. Conservative treatment of ectopic pregnancy generally refers to drug treatment, using chemical drugs. It is mainly applicable to patients with stable tubal pregnancy and those with persistent ectopic pregnancy after conservative surgery. Chemotherapy must be used in patients with a confirmed diagnosis of ectopic pregnancy and in those in whom intrauterine pregnancy has been ruled out. Methotrexate (MTX) is commonly used for systemic medication, and the mechanism of treatment is to inhibit trophoblast proliferation, destroy the villi, and cause necrosis, detachment, and resorption of embryonic tissue. The application of chemical drug treatment may not be successful in every case, therefore, during MTX treatment, ultrasonography and blood HCG should be applied for close monitoring, and attention should be paid to the patient’s condition and drug toxicity and side effects. If the blood HCG decreases and is negative for 3 times in a row 14 days after the drug is used, abdominal pain is relieved or disappears, and vaginal bleeding decreases or stops, it is regarded as a significant effect. If the condition does not improve, or even acute abdominal pain or tubal rupture symptoms occur, then immediate surgical treatment should be carried out. For patients with ectopic pregnancy treated conservatively, even if the blood HCG turns negative, they still need to periodically review the ultrasound to know the condition of the mass, and have a tubal imaging before the next pregnancy. If abdominal pain occurs, etc., you need to consult a doctor promptly.