For several decades we have avoided the immunisation of pregnant women, with the only exception being that of the tetanus vaccination in the absence of a previous basic immunisation. Nowadays, it is strongly advised to give several vaccines specifically during pregnancy : maternal immunisations against pertussis and influenza have been shown to prevent complications in both the foetus and the newborn as well as the woman during pregnancy and after delivery. This article aims to review these recommendations, their rationale and to address potential concerns that are often raised by physicians and patients. Finally, some practical aspects of vaccine administration are detailed.