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In a study with sows at various stages of the reproductive cycle, the effects of parturition, feed quantity and composition (content and type of crude fibre), exercise and access to water on dry matter content, and consistency of faeces were estimated. Parturition caused an increase in the dry matter content and reduced the defaecation frequency. The restriction of feed amounts in the last days of gestation and the change to lactation feed with reduced crude fibre content (6-3% in feed) intensified the physiologically occurring increase of the dry matter content. Moving activity and the amount of water ingested had only a small insignificant effect on the moisture of the faeces. The faeces became markedly softer when large amounts of fermentable fibre were used in the diet. The risk for constipation in periparturient sows increases when feed amounts and fibre content in the diet are strongly reduced. Therefore, it is recommended to offer sows daily minimum amounts of a diet (<2 kg) containing >7-8% crude fibre (including a highly fermentable fibre to improve faeces consistency) especially on the days near parturition.