1. WHO, Unicef, UNFPA, and the World Bank estimates. Trends in maternal mortality: 1990 to 2010. Geneva: World Health Organization; 2012.
2. Millennium development goals India Country report (2015) Ministry of statistics and programme implementation.
http://mospi.nic.in/sites/default/files/publication_reports/mdg_2july15_1.pdf
. Accessed 4 May 2017.
3. PAHO/WHO urges countries to take a closer look at life-threatening complications of pregnancy and childbirth (2014).
http://www.paho.org/hq/index.php?option=com_content&view=article&id=9651&Itemid=2&lang = en
. Accessed 7 Oct 2014.
4. West Bengal Wikipidia.
https://en.wikipedia.org/wiki/West_Benga
. Accessed 4 May 2015.
5. Maternal mortality ratio (MMR) (per 1000 live births) Niti.
http://niti.gov.in/content/maternal-mortality-ratio-mmr-100000-live-births
. Accessed 4 May 2015.