Uterine Lining

Definition - What does Uterine Lining mean?

The uterine lining is the wall of tissue that lines the interior of the uterine cavity. The uterine lining is the material that embryo implants into during early pregnancy and that is shed during menstruation. Certain disorders of the uterine lining can cause infertility.

Uterine lining is also called the endometrium.

FertilitySmarts explains Uterine Lining

The uterine lining varies, grows, and sheds itself throughout a woman’s monthly menstrual cycle. The process of the lining is determined by a consistent output of the female body’s two major sex hormones, estrogen, and progesterone. These hormones dictate the succession of the development in accordance with woman’s ovulation and menstruation cycle. Immediately after a menstrual period, when the endometrium has shed it’s lining, it begins to regrow lining in preparation for upcoming ovulation. By the time ovulation occurs, the uterus should be prepared to house a recently fertilized egg and support a developing pregnancy. This pattern repeats monthly.

In order for a pregnancy to occur, the uterine lining must offer a rich and thick lining for an embryo to implant into. This is true for conception as a result of intercourse or in vitro fertilization (IVF). A lining that is 8-13 mm thick is ideal for conception to occur. Lining that is too think or thick may impede an embryo’s chances of survival. If the uterine lining, which is monitored via ultrasound, does not develop to this thickness, then hormone replacement therapy may be required as treatment.

There are several conditions and complications that may impact the uterine lining. These include:

  • Endometritis: infection of the uterine lining. May cause bleeding and pain. If not addressed with medication, may cause long-term damage to the reproductive health system and the body in general.
  • Endometriosis: a condition of the uterine lining, where the lining grows on the exterior of the uterus as opposed to the interior. This results in painful menstrual periods with heavy bleeding and cramping. Infertility may result due to complications of this condition.
  • Endometrial cancer: cancer that exists and grows within the cells of the endometrium.
  • Growths, such as fibroids or polyps.

If these conditions exist, appropriate treatment may be required in order to avoid infertility.

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