In which stage do both genders become fully sexually mature?

The stage in which both genders become fully sexually mature is adolescence. This period typically occurs between the ages of 10 and 19 and is characterized by significant physical, emotional, and psychosocial changes. During adolescence, individuals experience puberty, which includes the development of primary and secondary sexual characteristics. For girls, this includes the onset of menstruation and breast development, while boys experience increases in testosterone leading to spermatogenesis and sexual maturation.

During this stage, individuals also become more aware of gender identity and the social dynamics associated with it, as well as the complexities of romantic relationships. This maturation lays the foundation for adult sexual relationships and reproductive capabilities, which are not fully realized until later stages of life.

Other options like school-age refer to a period before the onset of puberty, while middle adulthood and late adulthood are stages focused on different developmental tasks and challenges, primarily related to establishing relationships, parenting, and adjusting to aging, rather than sexual maturation.