title: Eating fish during pregnancy. Risk of exposure to toxic levels of methylmercury.
abstract: OBJECTIVE
  One of my pregnant patients consumes four cans of tuna a week. She became very concerned when she read that tuna contains methylmercury, which is toxic to the fetal brain. How should I advise her?
  
  
  CONCLUSIONS
  Fresh tuna might contain toxic levels of methylmercury, but levels are much lower in canned tuna. Reassure your patient that eating canned tuna will not harm her or her baby.
authors.affiliation: Hospital for Sick Children, Toronto, Ont.
authors.forename: Yaron
authors.initials: Y
authors.lastname: Yagev
authors.forename: Gideon
authors.initials: G
authors.lastname: Koren
mesh_terms: D000328:Adult; D000818:Animals; D004032:Diet; D004781:Environmental Exposure; D005260:Female; D005506:Food Contamination; D005519:Food Preservation; D006801:Humans; D008767:Methylmercury Compounds / Q000009:adverse effects*; D011247:Pregnancy; D011248:Pregnancy Complications; D018570:Risk Assessment; D017747:Seafood; D014413:Tuna; D014874:Water Pollutants, Chemical / Q000009:adverse effects*
chemical_list: D008767:Methylmercury Compounds; D014874:Water Pollutants, Chemical