[Smoking and pregnancy: the role of the gynecologist-obstetrician and the obstetrical team].

Pregnancy is a particular period of life which changes the woman's smoking behavior. One-third of smoking women stop smoking spontaneously during this period and a large proportion request help with smoking cessation. Gynecologist-obstetricians who are concerned by the technical aspects of the pregnancy and other classical risk factors (gestational diabetes, hypertension) play an indispensable role, but together with the entire obstetrical team they must become more involved to fully take into account this toxic disease in their everyday practice.