Is the lining of the uterus and is important function during the female reproduction process.

Function during menstrual cycle

   -   this lining will thicken
   -   blood vessels enrich the wall
   -   addition of glandular tissue

Function during pregnancy

   -   wall continues to thicken
   -   blood vessels enlarge
   -   Placenta is formed
   -   Oxygen and nutrition are brought to embryo

Endometrium is closely regulated or affected by estrogen and progesterone

Both are secreted in response to the release of an egg from the ovaries.

The endometrium is now prepared for implantation.

If no egg is fertilized then the endometrium will be shed. The lining is disolved and released during menstruation cycle.

The cycle of building the endometrial lining takes on average 28 days.