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Later at puberty, estrogen feminizes a young woman, giving her adult sexual characteristics.
An imbalance of maternal hormonal levels and some chemicals (or drugs) may alter the secondary sexual characteristics of fetuses.
(For other ways in which men commonly differ physically from women, see man.) During early fetal development, embryos of both sexes appear gender-neutral.
The earliest women whose names are known through archaeology include: 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, in some cultures, attracting a mate.
The ovaries, in addition to their regulatory function producing hormones, produce female gametes called eggs which, when fertilized by male gametes (sperm), form new genetic individuals.
The breast evolved from the sweat gland to produce milk, a nutritious secretion that is the most distinctive characteristic of mammals, along with live birth.
In mature women, the breast is generally more prominent than in most other mammals; this prominence, not necessary for milk production, is probably at least partially the result of sexual selection.
It is a stylized representation of the goddess Venus's hand-mirror or an abstract symbol for the goddess: a circle with a small equilateral cross underneath.
The Venus symbol also represented femininity, and in ancient alchemy stood for copper.
Referring to an unmarried female human as a woman may, in such a culture, imply that she is sexually experienced, which would be an insult to her family.
There are various words used to refer to the quality of being a woman.
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.Tags: Adult Dating, affair dating, sex dating