In France, 1/3 of infants at the age of one month are exclusively fed with breast milk. The others also with formula milk. The rate of breastfeeding varies by age, marital status, level of education, place of birth, body mass index and smoking addiction continued throughout the pregnancy. In addition, attendance at sessions of preparation for childbirth, the skin to skin contact after birth and a positive perception of breastfeeding by the partner are factors favoring his practice exclusively to the birth and even after a month of child’s life . The study, created by the Institut de veille sanitaire, focused on a sample of 136 children born in 2012 randomly selected throughout France.