[Psychosocial factors and sudden infant death syndrome].

Sudden infant death (SID) is a multifactorial syndrome in which the role of psychosocial factors should be taken into consideration. Deep changes in mores and in the way infants are cared for occurred in the second half of the XXth century. Fragmentation of the traditional family has led to increased isolation of the infant. Significant changes have also occurred in the status of women and have translated into increasingly early separation of the mother from her baby. These factors, together with economic difficulties that carry a risk of preterm birth and intrauterine growth retardation, may be involved in the genesis of SIDS. Difficulties experienced by the mother in relating with her child during the first few months of life, a critical period for interaction, may also play a role. Prevention of SIDS should take psychosocial factors into account and attempt to minimize their effect.