[Protection of working pregnant women and the fetus: what medical doctors have to know].

45% of workers in Switzerland are women who will sooner or later have to accomodate work and pregnancy. Pregnancy is not a disease but some occupational activities become more difficult and may cause health problems for the pregnant woman or the child to be born. Employers and medical doctors have to assure to the working pregnant women a pregnancy without work risks. Consequently they have to know the legal recommandations for the pregnancy protection which are noticed in the Swiss law. This article summarizes this topic in giving to medical doctors the necessary informations and advices, and explains the role of the occupational physician.