A psychosociological survey was carried out at the "Maternité Baudelocque", in Paris; 645 women were interviewed during their stay at the hospital after delivery, according to a semi-structured questionnaire. The main purpose of this survey was to study the factors able to improve the quality of prenatal care and women behaviour during pregnancy. The interview was composed of questions on the kind of medical care received during pregnancy, the participation in training for childbirth program, the changes in daily life (rest, nutrition, smoking) and the search for extra-information about pregnancy. On the whole, the interviewed mothers received intensive prenatal care. However, some individual features influenced the quality of this medical care, especially the active role of the women themselves. The data pointed out not only the impact of the involvement in training for childbirth, but also the influence of a personal search for information, which promotes the understanding and acceptance of the medical team requirements.