The contraction of the uterus occurs after delivery, that is, the uterus regains its strength, and the mother can judge the contraction of the uterus by touching the uterine fundus, observing the malodex and ultrasound examination. 1. If the condition of maternal malaria meets the above criteria, it proves that the uterus is contracting well; 3. Ultrasound examination: normal uterine morphology, good continuity of the plasma layer of the uterus, uniform echogenicity of the myometrium and no abnormal echogenicity in the uterine cavity through ultrasound examination usually indicate good uterine contraction. Most of the women may have small abdominal cramps and pains caused by uterine contractions, or even full abdominal pains, while a small number of women do not have symptoms, but just feel tightness in the lower abdomen or feel the presence of a lump. However, if the pain is severe and unbearable, or if there is continuous heavy vaginal bleeding, you should seek medical attention in time to avoid critical illnesses such as postpartum hemorrhage. In addition, the mother should be reminded that she should strictly follow the doctor’s instructions to go to the hospital for review and use imaging to determine the status of uterine regeneration, and should not just judge on her own and ignore the review, once the uterus is not fully regenerated, there is a possibility of complication of infection, which may easily cause other secondary diseases.