Uterus

Cross-section of human uterus.

The uterus or womb is part of the reproductive system of the female body. The uterus is the place a baby grows for nine months during pregnancy. It is a pear-shaped organ inside a woman. It is behind the bladder and in front of the rectum. The uterus weighs 70 grams.[1] The endometrium is the tissue that lines the uterus. A hormone called estrogen makes the endometrium thick with blood and fluid. This uterine lining gives the growing baby what it needs to grow.[2] The endometrium leaves the uterus as the monthly flow of blood (menstruation). The endometrium will form again. This happens every 28 days. The number of days can be different for each women. The fertilized egg will move through the fallopian tube and into uterus. It will then attach to the endometrium.

Anatomy

The uterus is part the female reproductive system. Other structures and organs that are part of the reproduction system are the vagina, ovaries and fallopian tubes.[3]

The uterus has four main parts. The fundus is the upper part of the uterus. It has a rounded shape. Another part of the uterus is the body. The uterotubal angles are the parts connected to the Fallopian tubes. The bottom part of the uterus is the cervix.[4] The uterus has three layers. The outer layer is called the perimetrium.[5] It is a thin layer that surrounds the outside of the uterus. The perimetrium is made of tissue made of epithelial cells. The middle layer is the myometrium. Most of the uterus is made up of the myometrium.[6] The layer on the inside is the endometrium. The endometrium is made of secretory, ciliated, and basal cells.[4] The uterus is not in the same place for all women. It is tilted forward in most women. Other women have a uterus that tilts up or backwards.[4][7][8]

The uterus is supplied by blood vessels. Blood travels to the uterus through arteries. The big arteries are the internal iliac arteries. The big arteries branch off into smaller arteries called the ovarian artery and the uterine artery. The smaller arteries give blood to all the layers of the uterus. The blood returns to the heart and lungs through the veins.[9]

The uterus is held in place by ligaments. These are the anterior, posterior, lateral, uterosacral, and round ligaments. The position of the uterus can vary depending on the contents of the bladder.[4]

The uterus changes during the life of a woman. It is inactive during childhood and old age. During the time that a woman or girl can have a baby it is a very active organ. It does many things. It is where menstruation begins, it is the place where the fertilized ovum attaches, it is the place where the baby grows, it is the strong muscle that pushes the baby out during birth.[6]

Other Languages
العربية: رحم
aragonés: Utero
ܐܪܡܝܐ: ܡܪܒܥܐ
asturianu: Úteru
Avañe'ẽ: Membyryru
azərbaycanca: Uşaqlıq (anatomiya)
বাংলা: জরায়ু
Bân-lâm-gú: Seⁿ-kiáⁿ-tē
беларуская: Матка жанчыны
беларуская (тарашкевіца)‎: Маціца
български: Матка
bosanski: Materica
català: Úter
čeština: Děloha
chiShona: Chibereko
Cymraeg: Croth
dansk: Livmoder
Deutsch: Gebärmutter
ދިވެހިބަސް: ރަހިމު
eesti: Emakas
Ελληνικά: Μήτρα
English: Uterus
español: Útero
Esperanto: Utero
euskara: Umetoki
فارسی: رحم
français: Utérus
Frysk: Liifmoer
Gàidhlig: Machlag
galego: Útero
한국어: 자궁
հայերեն: Կնոջ արգանդ
हिन्दी: गर्भाशय
hrvatski: Maternica
Ido: Utero
Bahasa Indonesia: Rahim
italiano: Utero
עברית: רחם
Basa Jawa: Rahim
Kabɩyɛ: Pɩɣa nʋmʋʋ
қазақша: Жатыр
kurdî: Malzarok
Кыргызча: Жатын
Latina: Uterus
latviešu: Dzemde
lietuvių: Gimda
lingála: Ebóteli
മലയാളം: ഗർഭപാത്രം
मराठी: गर्भाशय
Bahasa Melayu: Rahim
မြန်မာဘာသာ: သားအိမ်
Nederlands: Baarmoeder
नेपाली: पाठेघर
नेपाल भाषा: युटेरस
日本語: 子宮
norsk: Livmor
norsk nynorsk: Livmor
occitan: Utèr
oʻzbekcha/ўзбекча: Bachadon
polski: Macica
português: Útero
română: Uter
Runa Simi: Kisma
русиньскый: Матка
sardu: Ùteru
Scots: Womb
slovenčina: Maternica
slovenščina: Maternica
کوردی: مناڵدان
српски / srpski: Материца
srpskohrvatski / српскохрватски: Materica
Basa Sunda: Pianakan
suomi: Kohtu
svenska: Livmoder
Tagalog: Bahay-bata
தமிழ்: கருப்பை
татарча/tatarça: Аналык
తెలుగు: గర్భాశయము
ไทย: มดลูก
тоҷикӣ: Бачадон
ತುಳು: ಗರ್ಭಕೋಶ
Türkçe: Rahim
українська: Матка
Tiếng Việt: Tử cung
Winaray: Tagoangkan
吴语: 子宫
ייִדיש: טראכט
粵語: 子宮
中文: 子宫