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Pregnancy: To date, no relevant epidemiological data are available. Insulin is preferred for the treatment of diabetes in pregnancy in order to lower risk of foetal malformations associated with abnormal blood glucose level.
Lactation: Metformin is excreted into milk in lactating rats. Similar data are not available in humans and a decision should be made whether to discontinue nursing or to discontinue metformin, taking into account the importance of the compound to the mother.
