Ectopic pregnancy, refers to the implantation of a fertilized egg in an area outside the uterine cavity, commonly known as tubal pregnancy (more than 95% of cases). In patients treated surgically for ectopic pregnancy, the uterine wall needs 6-8 weeks to repair due to the post-operative effects of blood HCG (human chorionic gonadotropin). Normally, menstruation can resume in about 1-2 months, and theoretically, patients with ectopic pregnancy have a chance to conceive with normal ovulation as soon as their menstruation resumes. Menstruation is the cyclical shedding and bleeding of the endometrium that accompanies the cyclical changes of the ovaries (once a month, with a common cycle of about 28 days). Under the regulation of estrogen and progesterone, the endometrium is divided into proliferative phase, secretory phase and menstrual phase (the days we call menstruation, usually 3-5 days, which is the final result of the withdrawal of progesterone and estrogen). The blood HCG promotes the conversion of androgens into estrogen in the body and stimulates the formation of progesterone, which is secreted by the syncytial trophoblast cells of the placental chorionic membrane starting 10-14 days after conception. When an ectopic pregnancy is treated surgically, the blood HCG level in the body drops sharply and it takes about 2-4 weeks to return to the pre-pregnancy level, so the first post-operative period is usually about 1-2 months after surgery. Clinically, minimally invasive surgery for ectopic pregnancy can be prepared for pregnancy after three times of normal menstruation after discharge from the hospital; for those who have been treated with chemotherapy in the early stage of ectopic pregnancy, it usually takes about six months for the natural absorption of the pregnancy material and there may be toxic side effects of the chemotherapy drug methotrexate (MTX), so it is better to prepare for pregnancy after one year; it is recommended to improve tubal imaging to clarify the condition of the fallopian tubes and pelvic cavity before preparing for pregnancy to reduce the possibility of another ectopic pregnancy.