Ultrasound can show basal lamina injury, which will reveal changes in the uterus such as thinning of the endometrium, uneven echogenicity of the basal lamina, and disruption of the uterine cavity connection. Damage to the basal layer of the uterus can be caused by trauma, endometrial electrosurgery, abortion, IUD, IUD removal and other uterine operations. Ultrasound can find out whether the thickness of the endometrium is normal or not. The endometrium is affected by the hormone levels in the body and undergoes cyclic changes, and before menstruation, the endometrium is relatively thick, at least up to 8mm, while after the damage of the uterine basal layer, the endometrium will become thinner, and the endometrium may be 2-3mm before the onset of menstruation. Normal basal layer of the uterus has a strong level of echogenicity and uniform distribution of echogenicity. After basal layer damage, the endometrium is thinner, while other parts of the endometrium are thicker, which will result in uneven echogenicity of the basal layer. In some patients, the damage to the basal layer of the uterus is more serious, and ultrasound may reveal a continuous interruption of the uterine cavity line, which should be considered as a manifestation of uterine adhesions. Whether the basal layer of the uterus is damaged or not, it is necessary to go to a regular hospital for examination and judgment.