Tubal pregnancy following tubal embryo transfer into the contralateral fallopian tube

Ectopic and heterotopic pregnancy may occur with increased frequency following assisted reproductive technology ( ART) procedures. In addition, there may be unusual sites of implantation, which may cause atypical and confusing clinical manifestations. We present a case of tubal pregnancy after tubal embryo transfer (TET) to the contralateral fallopian tube. Four embryos were transferred to the left fallopian tube by laparoscopy, but the patient developed a right tubal pregnancy, possibly as a result of intrauterine or intra-abdominal migration of the embryo. ART patients must be followed closely soon after the procedure, and there should be a high index of suspicion for an unusual implantation site.