BJOG : an international journal of obstetrics and gynaecology
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Multicenter Study Comparative Study
Effect of Swedish snuff (snus) on preterm birth.
To compare the effects of Swedish snuff and cigarette smoking on risks of preterm birth. ⋯ The use of Swedish snuff was associated with increased risks of very and moderately preterm birth with both spontaneous and induced onsets. Swedish snuff is not a safe alternative to cigarette smoking during pregnancy.