A prospective and retrospective study of the consequences of neonatal surgery started recently in a neonatal intensive care unit. After a prenatal diagnosis of a surgical malformation has been established, the importance of a meeting with parents, neonatologists and surgeons is stressed. The relationships between the family and the neonatal team were good, although sometimes the surgeons seemed to be "forgotten". The infant's pain was usually prevented. Infants were actively managed before surgery and after surgery their rhythms were better respected.