Whether or not a child is considered female does not always determine whether or not the child later will identify themselves that way (see gender identity).
It is a popular misconception that the term "woman" is etymologically connected to "womb".
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.
(For other ways in which men commonly differ physically from women, see man.) During early fetal development, embryos of both sexes appear gender-neutral.
There are various words used to refer to the quality of being a woman.
The term "womanhood" merely means the state of being a woman, having passed the menarche; "femininity" is used to refer to a set of typical female qualities associated with a certain attitude to gender roles; "womanliness" is like "femininity", but is usually associated with a different view of gender roles; "femaleness" is a general term, but is often used as shorthand for "human femaleness"; "distaff" is an archaic adjective derived from women's conventional role as a spinner, now used only as a deliberate archaism; "muliebrity" is a neologism (derived from the Latin) meant to provide a female counterpart of "virility", but used very loosely, sometimes to mean merely "womanhood", sometimes "femininity" and sometimes even as a collective term for women.