The woman called homo gametic sex with a body typical starting point, which means that the woman has two X chromosomes sex chromosomes, or karotyp 46, XX. The biological sex is formed by urgonaden, who early during embryonic time form müllerska and Wolffian ducts. In the female fetus regresses the Wolffian ducts, while the müllerska aisles further developed into more of the inner female genitals, which leads to the ovaries are endocrine glands of female hormones. However, female fetuses in comparison with male fetuses low levels of hormones. Estrogen in any greater amount begins to form first at puberty.
The woman has the ability to bear children after puberty. In the 45-55 age decreases the ability to become pregnant using their own eggs when menopause begins, and after 58, very few women who can become pregnant. Women may undergo pregnancy and give birth to children even several years after menopause if an egg is implanted.
The physical changes that will increase in puberty is the development of the female body shape, with developed breasts, female pubic hair and a stabilization of voice in a light tone range. Women's body shape is partly a question of the internal structure with a gracefully slender bones and muscles with small mounts of tendons and ligaments. Pelvic ring leg is soft shaped, and its output ring is so rounded that a child's head can pass. Over the hips and mammary glands, women have more or less strongly developed fat cushions. Milk glands, which grow during pregnancy are embedded in these and size of a woman's breasts has no bearing on her ability to breastfeed when she is delivered of the child. The average length of women varies worldwide. In Sweden the length in the 1990s, around 165 cm.
The individual's sex is determined normal at conception, then flick the fetus sex chromosomes consist of two X chromosomes. Of their genetic predisposition to develop women with large individual variations. There are genes in the sex chromosomes that control which biological sex individual receives, while both these and the other 22 chromosome pairs control other physical properties, such as height, hair and eye color. Even some of the psychological characteristics considered genetically determined, but may be affected primarily by environmental conditions. Psychology Professor Janet Shibley Hyde argues that men and women are very similar, she found, however, three exceptions, namely, certain sexual behaviors, aggressiveness (mainly physical), and physical activity. Another large British study showed that women and men are equally likely to resort to physical violence also sociologist Marja Walldén argue that men and women are born equally aggressive. For this judge, it is difficult to know whether gender characteristics are socially constructed or biological when scientists often disagree, and studies have different results.
Despite being born more boys than girls, women constitute a majority of the adult population. The reason is that the boys and men of all ages have higher mortality rates (including the fetus), and on average women live five years longer than men in Sweden. Among those who survive into middle age, the difference in life expectancy less, but always in favor of women with a few years.
There are general differences between women's and men's brains. The man's big brain is 8-10% larger than the woman. The man has 4% more brain cells than women and 100 grams more brain tissue.
Some philosophical trends, such as parts of feminism, Marxism and existentialism says that "woman" is a social role, a person brought up and which should be eliminated in order to achieve equality. Simone de Beauvoir formulated this in his famous statemen, "One is not born a woman, one becomes it".
In many religious directions have clear opinions expressed about girls-boys and women-men-social tasks and roles. In Sweden, one known case of the religious battle the long-running battle for women's right to exercise the priesthood. Another example of the churches doprätt, which linked with the naming and the law that gave the former authority, the Swedish church law, for example, reject the proposed name as suitable or unsuitable for the child, out of consideration for the child's future life was given girls' names that were considered suitable for girls and women and boys were given names that fit boys and men.
Some people may be biologically intersex or transgender because they may have a sex chromosome too much or have a stunted hormone system that allows the hormones can not act where they should be.