1. World Population Data Sheet 2016. PRB. 2016. Available from:
https://assets.prb.org/pdf16/prb-wpds2016-web-2016.pdf
. Accessed 4 May 2018.
2. National Institute of Population Studies, Macro International Inc. Pakistan demographic and health survey 2012–13. Islamabad: Government of Pakistan; 2013.
3. Cleland J, Conde-Agudelo A, Peterson H, Ross J, Tsui A. Contraception and health. Lancet. 2012;380(9837):149–56.
4. Khan A, Shaikh BT. An all time low utilization of intrauterine contraceptive device as a birth spacing method- a qualitative descriptive study in district Rawalpindi. Pakistan Reprod Health. 2013;10(1):10.
5. National Institute of Population Studies P, Macro International I. Pakistan demographic and health survey 2006–7. Islamabad: Government of Pakistan; 2008.