+Sex characteristics are the biological features that distinguish sexes within a species. These can include [Reproductive Organs](/wiki/reproductive_organs) (primary) or other physical traits (secondary), often emerging under the influence of [Hormones](/wiki/hormones). They contribute to the diversity and continuation of life.
+## See also
+- [Sex](/wiki/sex)
+- [Gender](/wiki/gender)
+- [Human Development](/wiki/human_development)
... 1 more lines