title: Sigmoid Microinvasion by an Ectopic Pregnancy.
abstract: Approximately 2.1% to 8.6% of all pregnancies after IVF with embryo transfer have been reported to be ectopic. In this report, we present a case of presumed intestinal microperforation caused by an ectopic pregnancy following IVF.
  
  
  
  A 29-year-old woman presented with rectal bleeding. She had previously been treated for an ectopic pregnancy for which she had received two doses of methotrexate. Colonoscopy and abdominal CT angiography were performed and showed that the ectopic pregnancy was attached to the sigmoid colon. Surgery was performed to remove the ectopic pregnancy. Because intestinal microperforations were suspected, the patient received intravenous antibiotic therapy during her hospitalization.
  
  
  
  In cases of intestinal bleeding, clinicians should consider the possibility of intestinal involvement of an ectopic pregnancy, even if the response to treatment for the ectopic pregnancy has been appropriate.
authors.affiliation: Department of Obstetrics, Gynecology and Reproduction, Université Laval, Québec QC.
authors.forename: Joalee
authors.initials: J
authors.lastname: Paquette
authors.affiliation: Department of Obstetrics, Gynecology and Reproduction, Université Laval, Québec QC.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Leboeuf
authors.affiliation: Department of Obstetrics, Gynecology and Reproduction, Université Laval, Québec QC.
authors.forename: Émilie
authors.initials: É
authors.lastname: Gorak-Savard
mesh_terms: D000328:Adult; D012809:Colon, Sigmoid / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology; D003113:Colonoscopy; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology
keywords: Ectopic pregnancy; intestinal microperforations; in vitro fertilization; methotrexate; single-dose methotrexate