In clinical practice, the determination of incomplete abortion is based on the ultrasound examination results and the clinical history. In clinical practice, incomplete miscarriage may show the following symptoms: First, vaginal bleeding may be relatively long, such as abortion, which may last for more than 7 days, and may be accompanied by paroxysmal lower abdominal pain. Secondly, the vaginal discharge may have an odor, which is often caused by the residual tissue after an incomplete abortion, causing an infection in the uterine cavity and resulting in an odor in the discharge. Thirdly, fever may also appear. Therefore, once the above symptoms appear clinically, it is recommended to go to the hospital for ultrasound examination as soon as possible, and then decide whether to give clearance surgery according to the results of ultrasound examination. If there is an infection, the inflammation must be controlled first before giving the clearance operation, and it is also recommended that 10 days after the clearance operation, you must go to the hospital for another corresponding examination to exclude the possibility of incomplete clearance.