: Many marine species change sex during their lifetime.

In humans, sexual maturation is associated with adolescence. Recent psychometric studies, such as those using the Woodcock-Johnson IV Tests (WJ IV COG), examine whether cognitive maturation differs by sex.

: In some sex-changing species, a subset of the population may skip the "first" sex phase entirely and mature directly into the "second" sex (e.g., "pure males" in protogynous species). 3. Case Studies in Wildlife

: Sex hormones and maternal effects play a significant role in the physiological transition to maturity. Sex-ratio evolution in sex changing animals - PubMed

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