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The uterus is an organ with tissue to protect and nurture the developing fetus and muscle to expel it when giving birth.
The vagina is used in copulation and birthing, although the term vagina is often colloquially and incorrectly used in the English language for the vulva or external female genitalia, which consists of (in addition to the vagina) the labia, the clitoris, and the female urethra.
In particular, previously common terms such as office girl are no longer widely used.
This contrasts with the typical male karotype of 46, XY; thus, the X and Y chromosomes are known as female and male, respectively.
Because humans inherit mitochondrial DNA only from the mother's ovum, genetic studies of the female line tend to focus on mitochondrial DNA.
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).
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.
In some cases, even if a child had XX chromosomes, if they were born with a penis, they were raised as a male.