Image of a nude woman on the Pioneer plaque sent to outer space. The final draft had a line indicating the vulva, but for the published version it was removed at the request of NASA chief scientist John Naugle.Symbol of the planet VenusThe human female reproductive systemDetail from Bouguereau's The Birth of VenusA Bangladeshi woman weaving. Textile work has historically been considered a female occupation in some cultures.Zanzibar woman, c. 1890
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Women (29260)

A woman is an adult female human, as contrasted with a man (an adult male), and a girl, (a female child). The term woman (irregular plural: women) is used to indicate biological sex distinctions, cultural gender role distinctions, or both. more...

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Etymology

The English term "man" (from Proto-Germanic mannaz "man, person") and words derived therefrom can designate any or even all of the human race regardless of their gender or age. This is indeed the oldest usage of "man". In Old English the words wer and wyf (also wæpman and wifman) were what was used to refer to "a man" and "a woman" respectively, and "man" was gender neutral. In Middle English man displaced wer as term for "male human", whilst wyfman (which eventually evolved into woman) was retained for "female human". "Man" does continue to carry its original sense of "Human" however, resulting in an asymmetry sometimes criticized as sexist. (See also Womyn.)

The symbol for the planet Venus is the sign also known in biology for the female sex: a stylized representation of the goddess Venus's hand mirror: a circle with a small cross underneath (Unicode: ♀). The Venus symbol also represented femininity, and in ancient alchemy stood for copper. Alchemists constructed the symbol from a circle (representing spirit) above a cross (representing matter).

Biology and sex

Biological factors are not the sole determinants of whether persons are considered, or consider themselves, women. Some women can have abnormal hormonal or chromosomal differences (such as congenital adrenal hyperplasia, complete or partial androgen insensitivity syndrome or other intersex conditions), and there are women who may be without, at least for an earlier part of their lives, typical female physiology (trans, transgendered or transsexual women). (See gender identity.)

In terms of biology, the female sex organs are involved in the reproductive system, whereas the secondary sex characteristics are involved in nurturing children or attracting a mate. Most women have the karyotype 46,XX, but around one in a thousand will be 47,XXX and one in 2500 will be 45,X.

Although fewer females than males are born (the ratio is around 1:1.05), due to a longer life expectancy there are only 81 men aged 60 or over for every 100 women, and among the oldest, there are only 53 men for every 100 women. Women have a lower death rate than men, even in the uterus, living on average five years longer due to a combination of factors: genetics (redundant and varied genes present on sex chromosomes in women); sociology (such as not being expected in most countries to perform military service); health-impacting choices (such as suicide or the use of cigarettes and alcohol); the presence of the female hormone estrogen, which has a cardioprotective effect in premenopausal women; and the effect of high levels of androgens in men. Out of the total population there are 101.3 men for every 100 women (source: 2001 World Almanac).

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