After the conservative treatment of ectopic pregnancy, the endocrine re-adjustment, generally about 40 days to menstruation is normal. After the conservative treatment of ectopic pregnancy, if you have sex, no menstruation for 40 days, you should go to the obstetrics and gynecology department of the hospital, take blood to check the blood HCG or ultrasound examination of uterine adnexa to determine whether you have another ectopic pregnancy or intrauterine pregnancy. Patients with ectopic pregnancy have a higher risk of having another ectopic pregnancy than normal women of childbearing age. If blood HCG is positive, and if the site of the gestational sac, yolk sac, or even the embryonic bud can be seen by ultrasonography, intrauterine pregnancy or ectopic pregnancy can be determined; if the gestational sac or embryonic bud cannot be seen in the uterus or outside of the uterus by ultrasonography, then it is a pregnancy of an unknown site, and one needs to be alert to the possibility of ectopic pregnancy. Blood HCG value helps to further clarify the diagnosis of unknown site pregnancy, if the blood HCG value ≥3500u/L, the existence of ectopic pregnancy should be highly suspected; if the blood HCG value <3500u/L, it is necessary to continue to observe the changes in serum HCG value, if the HCG value continues to rise, review the ultrasound to clarify the location of the pregnancy, if the HCG value does not rise or rises slowly, you can scrape the endometrium to take the endometrium for pathological examination. If the HCG value does not rise or rises slowly, the endometrium can be scraped for pathologic examination.