Sex refers to the biological characteristics of men and women, which are universal and
do not change. These sets of biological characteristics are not mutually exclusive as
there are individuals who possess both, but these characteristics tend to differentiate
humans as males and females. (1, 2)
(1) Gender Mainstreaming Learning & Information Pack, UNDP
(2) Concepts and Definitions, Office of the Special Adviser on Gender Issues and
Advancement of Women (OSAGI)