Abstract

BARON, María Adela; SOLANO, Liseti; PENA, Evelyn  and  MORON, Alba. Estado de la nutrición de folato, vitamina B₁₂ y hierro en adolescentes embarazadas. ALAN [online]. 2003, vol.53, n.2, pp.150-156. ISSN 0004-0622.

SUMMARY. Folate, vitamin B₁₂ and iron nutritional status in pregnant adolescents. Pregnancy in adolescence increases nutritional risk, due to higher demand of nutrients for maternal and fetal growth. This study was aimed to evaluate folate, vitamin B₁₂ and iron status of pregnant adolescents at first trimester of pregnancy. A cross sectional, descriptive study was performed in 122 pregnant adolescents from Valencia, Carabobo state, 1997. Serum and erythrocyte folate and serum vitamin B₁₂ was determined by radioassay; serum ferritin by enzimoimmunoassay; hemoglobin were performed by semi-automated method. Statistical analysis included standard deviation and frequencies. For serum folate 1.7% was found in negative balance and 19.0% at marginal status. For erythrocyte folate, 5.8% was deficient and 1.7% marginal. For serum vitamin B₁₂, 8.3% was deficient and 13.2% marginal. Iron deficiency was found in 19.0% of the adolescents. Prevalence of anemia was of 13.1%, being iron deficiency the main cause. There was high nutritional risk regarding iron status, although iron intakes exceeded the recommendations, but only a small proportion was bioavailable. Prevalence of anemia was lower than reported by other studies and iron deficiency was higher than folic acid and vitamin B₁₂ deficiences. Pregnant adolescents are at a high biological and nutritional risk.

Keywords : Pregnant adolescent,; folate,; vitamin B₁₂; iron; ferritin,; anemia; micronutrient deficiencies,; intakes.