The endometrium is the mucosal tissue of the uterine cavity and consists of a basal layer and a functional layer, which undergoes cyclic changes and is shed once a month in the form of menstruation. The wall of the uterus mainly refers to the myometrium, which is composed of a large number of muscle fibers and smooth muscles and has a strong stretch, especially after pregnancy with the increase in the number of days of pregnancy, and a good stretch, the two are in different positions and have different functions, the endometrium can mainly be shed to menstruate and enable the fertilized egg to bed, grow and develop and finally form an embryo in clinical pregnancy, this is the difference between the two This is the difference between the two. Ultrasound can be used to find out if there are any abnormalities in the uterine wall and can find out if there are any abnormalities in the endometrium.