Ectopic pregnancy is one of the common gynecological emergencies and carries the risk of maternal death. More than 90% of ectopic pregnancies occur in the fallopian tube, in addition to cervical pregnancy, ovarian pregnancy and abdominal pregnancy, which are very rare. Such a fertilized egg not only cannot develop into a normal fetus, but also poses a danger like a time bomb. I. The exact etiology of ectopic pregnancy is not yet clear and may be related to the following factors 1, abnormal fallopian tubes: including changes in the morphology and function of the fallopian tubes due to chronic tubal inflammation, pelvic inflammatory disease, tubal surgery, etc. 2, contraceptive failure: In addition to the failure of birth control and conception may be ectopic pregnancy, we need to be alert to the use of emergency contraceptive pills, which will slow down the peristalsis of the fallopian tubes and therefore will most likely lead to ectopic pregnancy. 3. History of ectopic pregnancy: especially in women who have been treated for a previous ectopic pregnancy with preservation of the fallopian tube. 4. Assisted reproductive technology: the likelihood of ectopic pregnancy is 5-8% and there may be rare cases of simultaneous intrauterine and ectopic pregnancy. 5. Wandering fertilized egg: The fertilized egg is “overactive” and migrates from one of the formed fallopian tubes to the other side, and when it cannot pass through the fallopian tube due to its enlargement during the migration process, it lays in the fallopian tube, resulting in ectopic pregnancy. 6.Other: including endocrine abnormalities, mental tension, etc. The typical symptoms of ectopic pregnancy are irregular vaginal bleeding and abdominal pain after menopause, but in most cases, the symptoms are not typical, only menopause or vaginal bleeding, which can be easily confused with normal menstruation and menstrual disorders. When there is severe abdominal pain, fainting or even shock, it mostly indicates that the ectopic pregnancy has ruptured and haemorrhaged, which is life-threatening! Therefore, once women of childbearing age and sexual intercourse experience menopause, irregular vaginal bleeding or abdominal pain, they should go to the hospital immediately and the doctor will usually prescribe the following tests or examinations: 1. urine pregnancy test: to make a quick judgment of pregnancy or not. 2. 2.Transvaginal ultrasound: It is the main method to diagnose ectopic pregnancy and can detect most of the ectopic foci, but because some of the very early fertilized eggs are not developed enough, they cannot be seen under ultrasound, which may cause some difficulties for the clinician’s diagnosis. 3. Blood hCG: It is more sensitive than urine pregnancy test, but an elevated blood test can only indicate pregnancy, and usually more than 2 consecutive blood tests are needed to observe its fluctuating level. Therefore, when the doctor is not sure whether it is an intrauterine pregnancy or ectopic pregnancy, the patient may need to be seen several times within a short period of time for multiple ultrasound and blood hCG tests, please do not feel bored because the doctor is responsible for your health and life. The treatment of ectopic pregnancy includes surgery and medication, with the majority of the former being used, and the laparoscopic surgery, which is less invasive and quicker to recover, being the main one. Because laparoscopic surgery requires general anesthesia, the condition of not having eaten for 8 hours prior to surgery must be met. Open surgery mostly responds to emergencies in which the patient has a ruptured ectopic pregnancy, hemorrhage, or shock. Drug treatment is MTX, which has a “lethal” effect on the fertilized egg, but it is mostly applied to patients with small ectopic pregnancy lesions, low blood hCG and stable conditions, and the efficacy is mostly inaccurate, requiring long-term follow-up or even surgery. Although ectopic pregnancy is not as appalling as cancer, it is still a rather dangerous disease that requires a high degree of vigilance and good health care in daily life to reduce the chance of ectopic pregnancy or prevent its serious consequences, including: 1. actively prevent and treat tubal infection, pay attention to personal hygiene after delivery, abortion and menstruation to prevent infection, and provide timely treatment if you have pelvic inflammatory disease 2. to take good contraceptive measures and avoid the use of emergency contraceptive pills as far as possible; 3. to consult a doctor in time if there is any abnormality, listen carefully to the doctor’s advice and do follow-up examinations.