1. Infertility around the globe: New thinking on gender, reproductive technologies and global movements in the 21st century;Inhorn;Hum Reprod Update,2015
2. United Nations, Department of Economic and Social Affairs, Population Division (2019). World Population Prospects 2019: Highlights (ST/ESA/SER.A/423).
3. Infertility in Central Africa: Infection is the cause;Collet;Int J Gynaecol Obstet,1988
4. Primary and secondary infertility in Sub-Saharan Africa;Larsen;Int J Epidemiol,2000
5. National, regional and global trends in infertility prevalence since 1990: A systematic analysis of 277 health surveys;Mascarenhas;PLoS Med,2012