title: [Spontaneous heterotopic pregnancy. Case report].
abstract: BACKGROUND
  Heterotopic pregnancy has increased in frequency due to the increasing number of assisted reproductive procedures. The diagnosis is difficult even with ultrasonography.
  
  
  OBJECTIVE
  To report the case of a patient with heterotopic pregnancy without a history of in vitro fertilization or fertility treatment.
  
  
  CONCLUSIONS
  Heterotopic pregnancy is a rarity that requires a high diagnostic suspicion, specialized desk studies and early surgical care to ensure a favorable outcome to the embryo.
authors.affiliation: Hospital Angeles del Pedregal, México, DF.
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: Mancera Reséndiz
authors.forename: Raúl Rodrigo
authors.initials: RR
authors.lastname: Arredondo Merino
authors.forename: Francisco Javier
authors.initials: FJ
authors.lastname: Gómezpedroso Rea
authors.forename: Patricia
authors.initials: P
authors.lastname: Rivera Rodríguez
authors.forename: Paola Iturralde
authors.initials: PI
authors.lastname: Rosas Priego
mesh_terms: D000006:Abdomen, Acute / Q000209:etiology; D000328:Adult; D004630:Emergencies; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D010535:Laparoscopy / Q000379:methods*; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000175:diagnosis / Q000601:surgery*