DOI: 10.1055/s-00030576

Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics

References

United Nations.
Department of Economic and Social Affairs.
Population Division. World Contraceptive Use 2010 (POP/DB/CP/Rev2010). 2011.
http://www.un.org/esa/population/publications/wcu2010/WCP_2010/Data.html . Accessed October 22, 2017

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