Heterotopic triplet pregnancy: report of a patient with remnant tubal ectopic and intrauterine twin pregnancy after frozen-thawed embryo transfer.

A case of heterotopic triplet pregnancy after frozen-thawed embryo transfer is presented. The patient conceived after transfer of three frozen-thawed embryos at a fertility clinic where she had previously undergone laparoscopic left salpingectomy due to pyosalpinx. Approximately 4 weeks after the embryo transfer, she presented with a complaint of abnormal genital bleeding and was diagnosed by ultrasound as having a dichorionic twin pregnancy.