Koren, G Outcome of pregnancy after first trimester exposure to H2 receptor antagonists. [electronic resource] - American journal of perinatology Jan 1991 - 37-8 p. digital Publication Type: Journal Article ISSN: 0735-1631 Standard No.: 10.1055/s-2007-999336 doi Subjects--Topical Terms: Abnormalities, Drug-Induced--prevention & controlCimetidine--adverse effectsFemaleHistamine H2 Antagonists--adverse effectsHumansInfant, NewbornOntario--epidemiologyPregnancyPregnancy OutcomePregnancy Trimester, FirstRanitidine--adverse effectsRisk Factors