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Many taxa show substantial differences in lifespan between the sexes. However, these differences are not always in the same direction. In mammals, females tend to live longer than males, while in birds, males tend to live longer than females. One possible explanation for these differences in lifespan is the unguarded X hypothesis, which suggests that the reduced or absent chromosome in the heterogametic sex (e.g. the Y chromosome in mammals and the W chromosome in birds) exposes recessive deleterious mutations on the other sex chromosome.

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e not present at the beginning of epilepsy, this substantial absence of memory complaints at epilepsy onset emphasizes the need for comprehensive neurological and psychological treatment early with the given diagnosis. Treatment should focus on anticonvulsant drug regimens, patients' concerns and convey realistic expectations.Epilepsy is the most common serious neurological disorder in the world. Despite medical and surgical treatment, many individuals continue to have seizures, suggesting adjunctive management strategies are required. Pr