1. Global survey of healthcare practitioners' beliefs and practices around intrauterine contraceptive method use in nulliparous women;KI Black;Contraception,2013
2. Department of reproductive health and research, WHO. Medical eligibility criteria for contraceptive use-Part II using the recommendation. Geneva, Switzerland, 2015. Available at: http://www.who.int/reproductivehealth/publications/family_planning/MEC-5/en/. Accessed 03/12/2016.
3. ACOG Practice Bulletin No. 121: Long-acting reversible contraception: Implants and intrauterine devices;Obstetrics and gynecology U6,2011
4. United Nations. Trends in contraceptive use worldwide 2015, 2016. Available at: http://www.un.org/en/development/desa/population/publications/pdf/family/trendsContraceptiveUse2015Report.pdf. Accessed 04/12/2016.
5. United Nations. World contraception use 2015, 2016. Available at: http://www.un.org/en/development/desa/population/publications/dataset/contraception/wcu2016.shtml. Accessed 04/12/2016.