The Uterus<br /><ul><li> The Uterus, or womb is the part of female reproductive tract that nurtures and protects the fetus during pregnancy.
Located in the pelvis, anterior to the rectum and posterosuperior to the bladder.
During a woman’s reproductive years, in a non pregnant state, the size of Uterus is about 3 inches long and 2 inches wide. This expands significantly, to accommodate the fetus during pregnancy. </li></li></ul><li>Structure <br />Body of Uterus <br /><ul><li> The body, forms the upper part of Uterus- this is fairly mobile for expansion during pregnancy.
Upper part is connected to the two uterine tubes; the lower part joins the cervix and vagina.</li></ul>The Cervix<br /><ul><li> The lower part of the Uterus- a thick, muscular canal which is anchored to the surrounding pelvic structures for stability
Protrudes slightly into the vagina, where the cervical canal opens at the external OS</li></li></ul><li>Uterine Walls<br /><ul><li>Endometrium – A delicate lining that becomes thicker during menstrual cycle in preparation for implantation of embryo should fertilization occur.
Myometrium- A thick muscle layer that contains the majority of the blood vessels and nerves supplying the Uterus. It forms the great bulk of the uterine wall.
Perimetrium- A thin , slippery outer layer of connective tissue that is lining the pelvic cavity </li></li></ul><li>Position of Uterus <br /> In Majority of women, the uterus is Anterverted and Anteflex<br />Anterversion<br />The long axis of body of uterus is bent forward on the long axis of the vagina , forming an angle of 90 degrees<br />Anteflexion<br /> The long axis of body of uterus is bent forward at the level of the internal os on the long axis of the cervix, forming ang angle of 170 degrees<br />
Retroflexed<br />Body of Uterus bent backward on cervix<br />Retroverted<br />Fundus and Body of Uterus bent backward on the vagina <br />A Retroverted Uterus is mostly genetic and is perfectly normal but there are other instances where other factors can cause the uterus to be disposition:<br /><ul><li> Pelvic Surgery
Multiple births , Weak pelvic floors , Chronic muscle spasm around low back and sacrum</li></li></ul><li>The Uterus in Pregnancy <br /><ul><li>In pregnancy the uterus must enlarge to hold the growing fetus. From being a small pelvic organ, it increases in size to take up much of the abdominal cavity
In final stages of pregnancy, uterus will weigh around 2 lbs.
After pregnancy, the uterus rapidly decreases just slightly over the pre pregnant size. </li>