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This study is a randomized, double-blind trial among 300 pregnant Indian women in order to determine the effectiveness of vitamin B12 supplementation in improving maternal B12 status. Secondary aims for this trial include maternal hemoglobin, maternal weight gain during pregnancy and infant birthweight. All women will receive standard of prenatal obstetric care, including routine supplementation with iron and folate.
The incidence of poor fetal growth and adverse maternal and infant birth outcomes is quite high in India, and several lines of evidence suggest that maternal nutritional status may be an important factor. We have previously performed extensive evaluations of poor fetal and infant outcomes in other settings, and found that maternal micronutrient supplementation (B vitamins including vitamin B12, plus vitamins C and E) in HIV positive Tanzanian mothers decreased the risk of low birthweight (<2500 g) by 44% (RR (95% CI) 0.56 (0.38-0.82)), severe preterm birth (<34 weeks of gestation) by 39% (RR 0.61 (0.38-0.96)), and small size for gestational age at birth by 43% (RR 0.57 (0.39-0.82)). In a prospective cohort study of 410 pregnant Indian women, we recently found a strong relationship between maternal serum vitamin B12 concentration and risk of infant intrauterine growth retardation (IUGR). Compared to women in the highest tertile of serum B12 concentration, women in the lowest tertile were significantly more likely to have IUGR infants, after controlling for maternal age, weight, education, and parity (OR (95% CI) 5.98 (1.72-20.74)). We now propose a randomized, double-blind trial among 300 pregnant Indian women in order to determine the effectiveness of vitamin B12 supplementation (50 µg daily) in improving maternal B12 status. Secondary aims for this exploratory trial include maternal hemoglobin, maternal weight gain during pregnancy and infant birthweight. All women will receive standard of prenatal obstetric care, including routine supplementation with iron and folate. The study will be a collaborative effort between the Division of Nutrition, St John's Research Institute, Bangalore, India, and the Department of Nutrition, Harvard School of Public Health, Boston, US.
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Vitamin B12, Placebo
St. John's Medical Research Institute, St. John's National Academy of Health Sciences
Harvard School of Public Health
Published on BioPortfolio: 2014-08-27T03:31:59-0400
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A family of phylloquinones that contains a ring of 2-methyl-1,4-naphthoquinone and an isoprenoid side chain. Members of this group of vitamin K 1 have only one double bond on the proximal isoprene unit. Rich sources of vitamin K 1 include green plants, algae, and photosynthetic bacteria. Vitamin K1 has antihemorrhagic and prothrombogenic activity.
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