In vitro after surgery for ectopic pregnancy in the uterine horn, two fresh embryos or one fresh embryo can be transferred depending on the recovery of the uterus. In the case of surgical treatment of ectopic pregnancy at the uterine horn, if minimally invasive embryo retrieval is performed under hysteroscopic treatment, the uterus is not damaged in any way, the uterine volume is relatively large, and the uterus recovers well after the minimally invasive surgery, the transfer of two fresh embryos can be considered. In female patients with uterine horn ectopic pregnancy, if you choose open surgery for uterine horn partial resection treatment, after the surgery, the uterine cavity is obviously reduced, if the transfer of two fresh embryos to conceive twins, may cause obvious pressure on the uterine cavity, easy to occur aura uterine rupture or uterine rupture, so consider the transfer of one fresh embryo is better. In vitro fertilization after surgery for ectopic pregnancy in the uterine horn, two fresh embryos or one fresh embryo need to be transferred under the guidance of a medical professional, depending on the specific condition.