1. International classification of diseases;World Health Organization (WHO),2018
2. The epidemiology of male infertility;Winters;Urol Clin,2014
3. Male infertility;Meacham;J Urol,2007
4. Fertility and infertility: definition and epidemiology;Vander Borght;Clin Biochem,2018
5. WHO laboratory manual for the examination and processing of human semen,2010