Interstitial pregnancies have an increased probability of next ectopic pregnancy. If the previous pregnancy was an ectopic pregnancy, and if a tubal interstitial pregnancy occurs, the probability that the risk of ectopic pregnancy will still occur next time is increased compared to the normal population. This condition, like the previous ectopic pregnancy, may be related to the woman’s pelvic diseases, of which tubal inflammation is the most important, tubal adhesions, deformities, endothelial damage and peristaltic disorders, which lead to ectopic pregnancy. The way of previous ectopic pregnancy treatment will also have a great impact on the recurrence of ectopic pregnancy, if the previous ectopic pregnancy on the affected side of the fallopian tube to take conservative treatment, although barely save the fallopian tube, but after the operation is still prone to fallopian tube narrowing, part of the adhesion or tube part of the distortion of the tubal pattern, resulting in the tubal passage but not smooth, the affected side of the fallopian tube to recur the risk of ectopic pregnancy is increased. If the previous ectopic pregnancy on the affected side of the fallopian tube lesion removal, this time the fallopian tube can not be conceived, if the opposite side of the fallopian tube is smooth, can be normal conception, only the probability of ectopic pregnancy is increased. It is recommended that patients with ectopic pregnancy should undergo preconception examination before pregnancy preparation and follow up treatment as prescribed by the doctor.