title: Ovarian pregnancy associated with a fresh blastocyst transfer following in vitro fertilization.
abstract: Ovarian pregnancy is a rare subtype of ectopic pregnancy, and its mechanisms have not been clarified. We report a case of ovarian pregnancy that supports a blastocyst migration mechanism. An infertile woman became pregnant after a single blastocyst transfer following in vitro fertilization during a fresh non-donor cycle. Transvaginal ultrasound revealed a gestational sac-like structure containing an active fetus that was located adjacent to the corpus luteum of the right ovary. Laparoscopy identified a red, swollen implantation site in the ovary, which was completely removed by wedge resection without damaging the remaining parenchyma. This case demonstrated that a fresh blastocyst transferred into the endometrial cavity migrated through the fallopian tube, implanted on an ovarian surface, and formed an ovarian pregnancy.
authors.affiliation: Department of Reproductive Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ishikawa
authors.affiliation: Department of Reproductive Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
authors.forename: Michio
authors.initials: M
authors.lastname: Sanada
authors.affiliation: Department of Reproductive Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
authors.forename: Makio
authors.initials: M
authors.lastname: Shozu
mesh_terms: D000328:Adult; D004624:Embryo Transfer / Q000009:adverse effects*; D005260:Female; D005307:Fertilization in Vitro / Q000009:adverse effects*; D006801:Humans; D010535:Laparoscopy; D010053:Ovary / Q000601:surgery; D011247:Pregnancy; D065172:Pregnancy, Ovarian / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D014463:Ultrasonography
keywords: blastocyst; ectopic pregnancy; in vitro fertilization; laparoscopy; ovarian pregnancy