Girls' bits

A pink bra and some pink and purple striped knickers
Girls bits include the breasts, and the uterus (womb), ovaries (where eggs come from), vagina, vulva and clitoris - it is what girls have and boys don't. We need these things to make babies (reproduce). We also need our breasts to feed the baby once it has been born, if we want. However these parts of the body are also pleasurable when having sex or masturbating.

Clitoris

Illustration of the Female external genitalia with the clitoris labelled.
Illustration of the female external genitalia (vulva)
In front of the urethra (pee tube) the girl has a clitoris. This is the female equivalent of a man's penis - the clitoris is there to give a girl pleasure like the glans of a man's penis does for him! Like penises, clitorises come in different shapes and sizes, anything from a couple of millimetres long to an inch or more. Only the front half inch or so of the clitoris is uncovered when the small hood of skin that normally covers it is pulled back. When a woman's clitoris is excited it becomes full of blood and hardens up, rather like a man's penis, but is still pretty small (although again, the actual size varies a lot from woman to woman). The clitoris is an incredibly sensitive organ which is full of nerve endings - which in some women makes it too sensitive to directly touch. During sex, the penis pushes on the inner folds (labia) and these in turn stimulate the woman's clitoris.

Hymen

Cross section of the female reproductive system with red circle around the hymen
Illustration of the female reproductive system.

A girl's hymen is a very thin layer of skin at the opening of their vagina which is there when girls are born. It has a small hole in it which allows for blood to come out when girls start menstruating. If you are a "virgin" the hymen is still there, but after you have sex then your hymen gets "torn" and is no longer there. The first time people have sex when the hymen gets completely torn it can cause some bleeding and there may be a bit of soreness. This varies greatly from person to person and depends, to a certain extent, on how thick your hymen is. However having "sex" is not the only way that your hymen can get torn. It may very occasionally happen when riding bicycles, riding horses. It gets torn a bit if you use tampons, but even if this happens you are still technically a "virgin".

Ovaries

Cross section of the female reproductive system with the ovaries labelled
Illustration of the female reproductive system.
Ovaries are the part of the female human body that produces the ova (eggs) which, when fertilized by the male sperm - grow up into babies and then adults. They measure about 3cms by 1.5 cms by 1.5 cms in the adult female human body. They are found in the female pelvis. They are not actually attached to the fallopian tubes which carry the eggs down into the uterus but they are attached to the outer layer of the uterus by the uterine ligaments. Each ovary takes turns releasing an egg each month, however if one ovary is not working the the other one will take over completely. The ovaries also produce some hormones called estrogen and progesterone. Estrogen is responsible for all the sexual changes that occur in a woman when she goes through puberty. Progesterone and estrogen together are responsible for a woman's menstrual cycle.

Uterus

Cross section of the female reproductive system with the uterus labelled
Illustration of the female reproductive system.
A woman's 'Uterus' is also known as her 'Womb'. It is inside a woman's uterus that the human fetus develops. It is situated in the woman's pelvis. At the bottom end of her uterus is the woman's cervix. Her cervix makes up the top end of her vagina. The uterus's main job is to hold and nourish the developing baby when the woman gets pregnant. Therefore what the uterus does is to accept a fertilized ovum. The ovum normally gets fertilized by a man's sperm in her fallopian tube, and then this fertilized ovum decends into the woman's uterus. In the uterus the fertilised ovum becomes embedded in the wall of her uterus where it grows bigger and bigger. It gets nourished from blood vessels in the wall of the uterus, which themselves develop into the placenta. Roughly nine months after the fertilised ovum becomes embedded in the wall of the uterus, the uterus begins to contract - which is the beginning of the process of delivering the baby - that is pushing it out into the outside world, via the woman's cervix and vagina. The uterus also has a sexual response by directing the flow of blood to the woman's pelvis and her external sex organs including her vagina, labia and clitoris. When a woman climaxes (has an orgasm) her uterus is also involved.

Vagina

Cross section of the female reproductive system with the vagina labelled
Illustration of the female reproductive system.
In a woman - her vagina is a canal that extends from her vulva - which is part of her external genitalia - up to her cervix at the bottom end of her uterus. The walls of her vagina are made up of muscles which are very elastic and can contract. The vagina's elasticity allows it to stretch around a man's penis during sexual intercourse and also to let the baby out when the woman delivers her baby. Women's vaginas vary a great deal but the length of a woman's sexually unaroused vagina is about 6 - 7.5 cms long. During sexual arousal her vagina gets longer and wider. Above the vagina opening outside - is a woman's 'Mons pubis'. The inside of the vagina is a reddish pinkish colour, and the walls of the vagina is folded in ridges, so that it can stretch. Vaginal lubrication is provided by glands near the outside opening and near the cervix. These are called Bartolin's glands. The lining of the vagina also produces moisture. A woman's hymen is a thin mebrane of connective tissue situated at the opening of the vagina to the outside.

Vulva

Illustration of the Female external genitalia.
Illustration of the female external genitalia (vulva)
A woman's vulva are the two fleshy mounds between her legs, each side of the opening of her vagina. The vulva is made up of two sets of "lips". The bigger outer ones are called the labia majora and the inner ones are called the "labia minora". They can vary in size from woman to woman and also each side of the vulva may not be the same size. They are sexually sensitive and swell during sexual stimulation and intercourse. At the front of the vulva is your clitoris, and at the back of the vulva is the back passage called your anus.