The estimated number of Low birth weight (LBW) (<2500 g) babies is about 20 million (15.5% of living births) (1). Thus, decreasing 30% of LBW by 2025 is the third global target. Its rate rises to 17% in the developing countries, which is only 7% in developed countries (1).
The prevalence of LBW in Morocco is 11%, which is higher than those recorded in Algeria (7%), Tunisia (7%) and Jordan (10%) (1). besides, the LBW is a major determinant of infant mortality, and neonatal complications risk and morbidities in adulthood (1).Consequently, special and expensive costs are spent on LBW survivors (1). Many studies have identified the risk factors of LBW (1, 4). There is a growing interest in the risk factors as the health and genetic factors (4). How-ever, the socio-demographic factors are insufficiently controlled (4).