When doing gynecological ultrasound, it is found that the left adnexa is normally large and unclear, referring to the normal size and structure of the ovaries is not very clear, mainly for the following reasons: First, it is poor bladder filling after women hold urine, the effect will not be good. Second, it may be that the left side of the woman’s nearby area is affected by the intestinal canal, and too much gas is produced in the pelvic cavity will also lead to the situation that the left adnexal area will not be clear when observed. If a woman does not have pain in the left lower abdomen or more fluid in the pelvic cavity before the examination, she can also review the ultrasound again to confirm the diagnosis. Because of the deep location of the ovaries in women, it is not possible to detect ovarian lesions in time, so it is necessary to do ultrasound examination when ovarian lesions are suspected.