The job of the perimetrium is to protect the other linings of your uterus. It is very thin and covers both the endometrium and myometrium. Various ligaments help to keep the perimetrium in place inside your uterus.
The Uterus and Infertility
Sometimes, problems with your uterus can actually make it difficult for you to become pregnant. If you are having fertility issues or if you are undergoing fertility treatment, your uterus will be examined for various structural abnormalities. You will also be checked for problems with your uterine lining, such as endometriosis and uterine polyps.
Problems with the Uterus
Sometimes, abnormalities of the uterus itself can interfere with pregnancy.
Most women have a uterus that is situated in a vertical position inside the abdomen. However, sometimes your uterus can become tipped, and lean backwards towards your pelvis. A tilted uterus, also known as a retroverted uterus, can interfere with conception and make sexual intercourse painful.
A unicornate uterus is one that hasn't developed completely. It is smaller, generally only half the size of a normal uterus, and only has one fallopian tube. This makes conception and pregnancy difficult.
If you have a septate uterus, there is a piece of tissue that divides your uterus in half. This tissue can end part way through the uterus or it can run all the way down to your cervix. This condition can make implantation difficult and can increase your chances of miscarriage or early labor.