1. Regulacion del crecimiento fetal;Carrera,1981
2. Determinants of low weight: methodological assessment and meta-analysis;Kramer;Bull WHO,1987
3. Responsability of the obstetrician to the fetus. II. Influence of prepregnancy weight and pregnancy weight gain on birthweight;Simpson;Obstet Gynecol,1975
4. Postnatal experiences of intrauterine growth retardation infants;Villar,1989
5. Maternal factors affecting duration of pregnancy birth weight and fetal growth;Butler,1969