The study of stillbirths is a way to approach foetal medicine and a good opportunity to foster a closer relationship between obstetricians, pediatricians and public health physicians, which will lead to preventive measures known to be effective in decreasing mortality rates. Four hundred and ninety pregnancies which ended in stillbirths were investigated: 61 before 27 weeks of amenorrhea, 228 between 28th and 36th weeks, 194 after 37 weeks. The different causes were identified: intrauterine growth retardation and pathological pregnancies remain the most important causes but the authors attract attention to a category of foetal deaths occurring at the end of the pregnancy without any evident cause and for which "postmaturity" was likely. The data attract attention on the necessity to carry out research on stillbirths through a closer collaboration between obstetricians and pediatricians and suggest that appropriate preventive measures may lead to a significant reduction of the 25% of avoidable deaths.