We recommend a check-up with dental hygiene and x-rays before pregnancy. If a treatment is necessary, it should be done prior to pregnancy. Of course, also during pregnancy a treatment is possible, especially between month three and six. A good oral hygiene prevents bacteraemia which might affect pregnancy. It also prevents gingivitis and gingival swelling, which can sometimes be observed in pregnancy. Last but not least, as cariogenic bacteria can be transferred from mother to child, also the child benefits of a good oral hygiene of the mother.