1. World Health Organization and Food and Agriculture Organization of the United Nations . Vitamin and mineral requirements in human nutrition. 2nd edition, 2004. https://www.who.int/nutrition/publications/micronutrients/9241546123/en/
2. Prevalence of anaemia in pregnant women . Global health Observatory data Repository, 2017. Available: http://apps.who.int/gho/data/view.main.ANAEMIAWOMENPWREG?lang=en [Accessed 28 Jan 2020].
3. Goal 02 . End hunger, achieve food security and improved nutrition, and promote sustainable agriculture Geneva, World Health Organization, 2020. Available: https://indicators.report/goals/goal-2/
4. WHO recommendons on antenatal care for a positive pregnancy experience: World Health Organization, 2016. Available: https://www.who.int/reproductivehealth/publications/maternal_perinatal_health/anc-positive-pregnancy-experience/en/ [Accessed Jun 2020].
5. WHO recommendation on calcium supplementation before pregnancy for the prevention of pre-eclampsia and its complications, 2020. Geneva: World Health Organization. Available: https://apps.who.int/iris/bitstream/handle/10665/331787/9789240003118-eng.pdf?ua=1 [Accessed Jun 2020].