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Try out PMC Labs and tell us what you think. Learn More. Sex differences in the human brain are of interest for many reasons: for example, there are sex differences in the observed prevalence of psychiatric disorders and in some psychological traits that brain differences might help to explain. We report the largest single-sample study of structural and functional sex differences in the human brain female, male participants; mean age Males had higher raw volumes, raw surface areas, and white matter fractional anisotropy; females had higher raw cortical thickness and higher white matter tract complexity. There was considerable distributional overlap between the sexes.
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Sex is a trait that determines an individual's reproductive function, male or female , in animals and plants that propagate their species through sexual reproduction. Commonly in plants and animals, male organisms produce smaller gametes spermatozoa, sperm while female organisms produce larger gametes ova , often called egg cells. Males and females of a species may be similar sexual monomorphism , or have physical differences sexual dimorphism. The differences reflect the different reproductive pressures the sexes experience.
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NCBI Bookshelf. Endotext [Internet]. The chromosomal sex of the embryo is established at fertilization.
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