title: Prevalence of nutritional deficiencies in Mexican adolescent women with early and late prenatal care.
abstract: The objective was to evaluate the prevalence of specific nutritional deficiencies in a group of pregnant adolescents according to the gestational age when they started to receive prenatal care. A group of 163 pregnant adolescents that attended the Instituto Nacional de Perinatología (Mexico City) for the first time to receive prenatal care was evaluated. An anthropometrical evaluation was performed and a blood sample taken to determine hemoglobin, ferritin, erythrocyte folate and plasma zinc to all cases. The mean age was 15 years (11 to 17 years). The mean gestational age when starting prenatal care was 27 +/- 7 gestation weeks and most of them tended to have low weight (97 +/- 12% expected weight for height and gestational age). Eight of every ten adolescents had anemia and iron deficiency. Late prenatal care (> or = 25 weeks) was associated with the risk of presenting anemia OR 5.11 (CI 95% 2.4-10.7) iron deficiency (OR 3.5; CI 95% 1.7 to 7.1) and zinc deficiency (OR 2.9; CI 95% 1.1 a 7.6). In relation to folate deficiency, the opposite effect was observed (OR 0.10; CI 95% 0.02 a 0.48). Lack of opportune prenatal care was associated with the presence of iron and zinc depletion. Probably iron deficiency contributes to an erythrocyte folate accumulation.
authors.affiliation: Instituto Nacional de Perinatología (INPer), Montes Urales, México.
authors.forename: Esther
authors.initials: E
authors.lastname: Casanueva
authors.forename: Julieta
authors.initials: J
authors.lastname: Jiménez
authors.forename: Carlos
authors.initials: C
authors.lastname: Meza-Camacho
authors.forename: Mónica
authors.initials: M
authors.lastname: Mares
authors.forename: Luis
authors.initials: L
authors.lastname: Simon
mesh_terms: D000293:Adolescent; D017195:Adolescent Nutritional Physiological Phenomena; D000740:Anemia / Q000097:blood / Q000453:epidemiology; D018798:Anemia, Iron-Deficiency / Q000097:blood / Q000453:epidemiology*; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D005865:Gestational Age; D006801:Humans; D039382:Maternal Nutritional Physiological Phenomena; D008800:Mexico / Q000453:epidemiology; D009752:Nutritional Status; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic / Q000097:blood / Q000453:epidemiology*; D011253:Pregnancy in Adolescence / Q000097:blood*; D011295:Prenatal Care; D015995:Prevalence; D015032:Zinc / Q000172:deficiency
chemical_list: D015032:Zinc