title: Letter to the editor.
authors.forename: Terry
authors.initials: T
authors.lastname: McCarthy
mesh_terms: D000013:Congenital Abnormalities / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects*; D011247:Pregnancy; D011248:Pregnancy Complications; D011256:Pregnancy Outcome