1. World Health Organization. The prevalence of anemia in women: a tabulation of available information. Geneva, Switzerland: WHO; 1992.
2. Van den RB, Broak NR. Etiology of anemia in pregnancy in South Malawi. Am J Clin Nutr 2000; 72: 247S-256S. [
DOI:10.1093/ajcn/72.1.247S]
3. Van den Broek NR, Rogerson SJ, Mhango CG, Fletcher KA, Chimsuku LH, Ngwira BM, et al. Anemia in pregnancy in Southern Malawi: prevalence and risk factor. BJOG 2000; 107:437-438.
4. Amadi AN, Onwere S, Kamanu CI, Njoku Njoku OO, Aluka C. Study on the association between maternal malaria infection and anemia. J Med In Vest Pract 2000; 1: 23-25.
5. Aluka C, Amadi AN, Kamanu CI, Feyi-Waboso PA. Anemia in pregnancy in Abia State university teaching hospital Aba. J Med Invest Pract 2001; 92:58- 61.
6. World Health Organization: Report of WHO group of experts on nutritional anemia. Technical report series. Geneva, WHO, 1972.
7. Centers for Diseases Control: Criteria for anemia in children and childbearing-aged women. MMWR 1989; 38: 400- 404.
8. World Health Organization (WHO): The database on anemia includes data by country on prevalence of anemia and mean hemoglobin. Geneva, Switzerland: WHO; 2007.
9. Vahidinia AA, Shams S. Assessment of serum iron and iron deficiency anemia in sample of pregnant woman at delivery in Iran. Asia Pac J Clin 2004; 13:159-163.
10. Mahomed K, Iron and folate supplements in pregnancy. Cochrane Database Syst Rev 2000:CD00135.
11. Medicine of Medicine. Nutrition during pregnancy. Part II: Nutrient Supplements. Washington, DC: National Academy press, 1990.
12. Adam I, Khamis AH, Elbashir MI. Prevalence and risk factors of anemia in pregnant women of eastern Sudan. Transa R Soc Tropl Med 2005; 99:739-743. [
DOI:10.1016/j.trstmh.2005.02.008]
13. Ioka A, Tsukuma H, Nakamura K. Lifestyles and pre-eclampsia with special attention to cigarette smoking. J Epidemiol 2003; 13:90-95. [
DOI:10.2188/jea.13.90]
14. Ventura SJ, Hamilton BE, Mathews TJ, Chandra A. Trends and variations in smoking during pregnancy and low birth Weight: Evidence from the birth certificate, 1990-2000. Pediatrics 2003; 111:1176-1180.
15. Tuthill DP, Stewart JH, Coles EC, Andrews J, Cartildge PH. Maternal cigarette smoking and pregnancy outcome. Paediatr Perinat Epidemiol 1999; 13:245-253. [
DOI:10.1046/j.1365-3016.1999.00187.x]
16. Zotti ME, Replogle WH, Sappenfield WM. Prenatal smoking and birth outcomes among Mississippi residents. J Miss State Med Assoc 2003; 44:3-9.
17. Subramoney S, Gupta PC. Anemia in pregnant women who use smokeless to tobacco. Nicotine Tob Res 2008; 10:917-920. [
DOI:10.1080/14622200802027206]
18. Haller DL, Miles DR, Dawson KS. Victimization and perpetration among perinatal substance abusers. J Interpers Violence 2003; 18:760-780. [
DOI:10.1177/0886260503253239]
19. William F, Rayburn MD. Maternal and fetal effects from substance use. Clin Perinatol 2007; 34:559-571. [
DOI:10.1016/j.clp.2007.09.001]
20. Bondevik GT, Lie RT, Ulstein M, Kvale G. Maternal hematological status and risk of low birth weight and preterm delivery in Nepal. Acta Obstet Gynecol Scand 2001; 80: 402-408. [
DOI:10.1034/j.1600-0412.2001.080005402.x]
21. Malhorta M, Sharma JB, Batra S, Sharma S, Murthy NS, Arora R. Maternal and perinatal outcome in varying degrees of anemia. Int J Gynaecol Obstet 2002; 79:93-100. [
DOI:10.1016/S0020-7292(02)00225-4]
22. Hamalainen H, Hakkarainen K, Heinonen S. Anaemia in the first but not in the second or third trimester is a risk factor for low birth weight. Clin Nutr 2003; 22: 271-275. [
DOI:10.1016/S0261-5614(02)00209-1]
23. Lu ZM, Goldenberg RL, Cliver SP, Cutter G, Blankson ML. The relationship between maternal hematocrit and pregnancy outcome. Obtet Gynecol 1990; 71:190-194.