Ectopic pregnancy after 20 days of pregnancy is mainly considered to be persistent ectopic pregnancy, is an ectopic pregnancy after conservative surgical treatment of residual trophoblast cells continue to grow, the body’s blood HCG (human chorionic gonadotropin) is still at a high level, at this time, the pregnancy test still shows that the “pregnancy”. Ectopic pregnancy is usually referred to as tubal pregnancy, that is, the fertilized egg is planted in the fallopian tube instead of the uterine cavity. Under normal circumstances, after surgical treatment of ectopic pregnancy, the uterine wall needs 6-8 weeks to repair due to the effect of blood HCG, and menstruation can return after about 1-2 months, therefore, it is difficult to ovulate and fertilize again and get pregnant after 20 days of ectopic pregnancy. For young women with reproductive requirements, especially the opposite side of the fallopian tube has been removed or there are obvious lesions need to carry out conservative surgery for ectopic pregnancy, such as laparoscopic tubal opening embryo retrieval, it is difficult to completely remove the chorionic tissue during the operation, the residual trophoblast cells after the operation may continue to grow, and then bleed again, causing abdominal pain, etc., known as persistent ectopic pregnancy, the postoperative should be closely monitored by the dynamics of the blood HCG level, such as postoperative blood HCG values If the postoperative blood HCG value is elevated, the blood HCG value decreases <50% on the 1st day after the operation, or the blood HCG value does not decrease to less than 10% of the preoperative value on the 12th day after the operation, the diagnosis of persistent ectopic pregnancy can be made, and chemotherapy (methotrexate MTX) should be given in time, and if the blood HCG value decreases on the 14th day after the medication is administered, and the blood HCG value decreases and is negative for 3 times in a row, and the symptoms are relieved or disappeared, and the need for surgical treatment is not ruled out once again. To summarize, the second pregnancy after 20 days of ectopic pregnancy is usually a persistent ectopic pregnancy, i.e. the first treatment did not remove the pregnancy tissue completely, which needs to be treated with chemotherapy drugs, and if necessary, another surgical treatment.