• The endometrium functions as a complex multicellular structure that involves interactions of immune, endocrine and vascular systems. The strict regulation of this tissue to allow cyclical ‘injury’ and ‘repair’ at menstruation results in a remarkable physiological response that allows pregnancy to occur. | • The endometrium functions as a complex multicellular structure that involves interactions of immune, endocrine and vascular systems. The strict regulation of this tissue to allow cyclical ‘injury’ and ‘repair’ at menstruation results in a remarkable physiological response that allows pregnancy to occur. |