References
- Araújo CRC, Flores H. Improved spectrophotometric vitamin A assay. Clin Chem 1978; 24: 386
- Barnes AC. The placental metabolism of vitamin A. Am J Obstet Gynecol 1951; 61: 368–372
- Barreto-Lins MHC, Campos FACS, Azevedo MCNA, Flores H. A Re-examination of the stability of retinol in blood ad serum, and effects of a standardized meal. Clin Chem 1988; 34: 2808–2810
- Bessey OA, Lowry OH, Brock MJ, López JA. The determination of vitamin A and carotene in small quantities of blood serum. J Biol Chem 1946; 166: 177–188
- Biswas AB, Mitra NK, Chakraborty I, Basu S, Kumar S. Evaluation of vitamin A status during pregnancy. J Indian Med Assoc 2000; 98: 525–529
- Blomhoff R, Green MH, Norum KR. Vitamin A: physiological and biochemical processing. Annu Rev Nutr 1992; 12: 37–57
- Butte NF, Calloway DH. Proteins, vitamin A, carotene, folacin, ferritin and zinc in Navajo maternal and cord blood. Biol Neonate 1982; 41: 273–278
- Christian P, West KP, Jr, Khatry SK, Katz J, Shrestha SR, Kimbrough-Pradhan E, Leclerq SC, Pokhrel RP. Night blindness of pregnancy in rural Nepal—nutritional and health risks. Int J Epidemiol 1998; 27: 231–237
- Christian P, West KP, Jr, Khatry SK, Kimbrough-Pradhan E, Leclerq SC, Katz J, Shrestha SR, Dali SM, Sommer A. Night blindness during pregnancy and subsequent mortality among women in Nepal: effects of vitamin A and β-carotene supplementation. Am J Epidemiol 2000; 152: 542–547
- Christian P, West KP, Jr, Khatry SK, Leclerq SC, Kimbrough-Pradhan E, Katz J, Shrestha SR. Maternal night blindness increases risk of mortality in the first 6 months of life among infants in Nepal. J Nutr 2001; 131: 1510–1512
- Dimenstein R, Trugo NMF, Donangelo CM, Trugo LC, Anástacio AS. Effect of subadequate maternal vitamin A status on placental transfer of retinol and beta-carotene to the human fetus. Biol Neonate 1996; 69: 230–234
- Flores H, Ramalho RAG, Ribeiro ARLP. Intrahepatic distribuition of vitamin A in humans and rats. Int J Vitam Nutr Res 1988; 58: 276–280
- Hair, JF, Abderson, RE, Tatham, RL, Black, WC. 1995. Examining your data. Multivariate data analysis with readings. 4th ed. New Jersey: Prentice Hall. pp. 32–75.
- Ismadi SD, Olson JA. Vitamin A transport in human fetal blood. Am J Clin Nutr 1975; 28: 967–972
- Montreewasuwat N, Olson JA. Serum and liver concentrations of vitamin A in Thai fetuses as a function of gestational age. Am J Clin Nutr 1979; 32: 601–606
- Nierenberg DW, Nann SL. A method for determining concentrations of retinol, tocopherol, and five carotenoids in human plasma and tissue samples. Am J Clin Nutr 1992; 56: 417–426
- Organización Panamericana de la Salud. Visión integrada de la suplementación con vitamina A en las Americas. Informe de la Reunión Regional. Organización Panamericana de la Salud. 50 pp, Washington, DC 2001
- Radhika MS, Bhaskaram P, Balakrishna N, Ramalakshmi BA, Devi S, Kumar BS. Effects of vitamin A deficiency during pregnancy on maternal and child health. BJOG 2002; 109: 689–693
- Sivaprasadarao A, Findlay JBC. The mechanism of update of retinol by plasma-membrane vesicles. Biochem J 1988; 255: 571–579
- Sundaram M, Sivaprasadarao A, Desousa MM, Findlay JBC. The transfer of retinol from serum retinol-binding protein to cellular retinol-binding protein is mediated by a membrane receptor. J Biol Chem 1998; 273: 3336–3342
- Thomson AM, Billewicz WZ, Hytten FE. The weight of the placenta in relation to birthweight. J Obstet Gynaecol Br Commonwealth 1969; 76: 865–872
- Underwood BA. The determination of vitamin A and some aspects of its distribuition, mobilization and transport in health and disease. World Rev Nutr Diet 1974; 19: 123–172
- West KP, Jr. Extent of vitamin A deficiency among preschool children and women of reproductive age. J Nutr 2002; 132: 2857S–2866S