Smoking during pregnancy is a public health problem. Individual screening is carried out in France during pregnancy consultations, followed by non-systemic care (with or without nicotine replacement therapy). In the UK, pregnant smokers are routinely screened during pregnancy follow-up and then referred to smoking cessation services. In order to improve their adherence, and smoking cessation, patients can be contacted, in particular by phone. We therefore recommend to systematically screen for smoking during pregnancy by asking the question of smoking or by measuring the CO exhaled during the various consultations, to offer care in collaboration with a local smoking cessation service and renew the requests if necessary. We need to develop these care networks in France.