The precautions to be taken are:

To avoid taking drugs except regulation of the doctor to whom you announced that there is a delay of rules;
To warn the radiologist who you are perhaps pregnant during the radiological examinations;
To avoid alcohols, them exciting and the tobacco;
To avoid the direct contact with patients reached of contagious diseases;
To increase rest period compared to the normal one; Given up horsemanship temporarily;
To work normally; Fact your care of toilet as usual during the months of pregnancy;
To continue your sexual life normally; Not to neglect not your dental care.