Complex sentence: Transgender issues manifest at different times in life in different individuals; as for example, gender dysphoria the condition is often apparent in early childhood, when such a child may express behavior in congruent with and dissatisfaction related to their assigned gender.
Split into simpler sentences: Transgender issues manifest at different times in life in different individuals. In most cases of gender dysphoria, the condition is often apparent in early childhood, when such a child may express behavior incongruent with and dissatisfaction related to their assigned gender.