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The grandmother hypothesis is a hypothesis to explain the existence of menopause in human life history by identifying the adaptive value of extended kin networking. It builds on the previously postulated "mother hypothesis" which states that as mothers age, the costs of reproducing become greater, and energy devoted to those activities would be better spent helping her offspring in their ...
Menopausal hormone therapy, clonidine, gabapentin, selective serotonin reuptake inhibitors [ 4 ][ 5 ] Menopause, also known as the climacteric, is the time when menstrual periods permanently stop, marking the end of reproduction. [ 1 ][ 6 ] It typically occurs between the ages of 45 and 55, although the exact timing can vary. [ 7 ]
Menstrual synchrony, also called the McClintock effect, [ 1 ] or the Wellesley effect, [ 2 ] is a contested process whereby women who begin living together in close proximity would experience their menstrual cycle onsets (the onset of menstruation or menses) becoming more synchronized together in time than when previously living apart.
Higher levels of estrogen linked to more sleep in perimenopause. At the study’s conclusion, scientists found that study participants who reported sleeping between six to nine hours a night ...
Psychological sex differences refer to emotional, motivational, or cognitive differences between the sexes. [9][8] Examples include greater male tendencies toward violence, [10] or greater female empathy. The terms "sex differences" and "gender differences" are at times used interchangeably, sometimes to refer to differences in male and female ...
Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following gonadal determination. [1] Sexual differentiation includes development of different genitalia and the internal genital tracts and body hair ...
The neuroscience of sex differences is the study of characteristics that separate brains of different sexes. Psychological sex differences are thought by some to reflect the interaction of genes, hormones, and social learning on brain development throughout the lifespan. A 2021 meta-synthesis led by Lise Eliot found that sex accounted for 1% of ...
The view that there is a dominance hierarchy among humans consisting of "alpha males" and "beta males" is sometimes reported in the mainstream media. The term alpha male is often applied to any dominating man, especially bullies , [ 10 ] despite the fact that dominating behaviour is rarely seen as a positive trait for either an ideal date or a ...