When a woman has a spontaneous abortion around 20 days of pregnancy, there will be a small amount of vaginal bleeding, followed by paroxysmal abdominal pain, which gradually evolves into symptoms such as increased bleeding and intensified pain. 1.Small amount of bleeding: the woman will have a small amount of vaginal bleeding, which is similar to the amount of women’s menstruation and shows irregular bleeding; 2.Paroxysmal abdominal pain: some patients have paroxysmal lower abdominal pain, or Pain in the lower back; 3. Increased abdominal distension and heavy bleeding: Some residues are left inside the uterine cavity, and another part of the pregnancy can be expelled from the uterine cavity, at this time, because the residues affect the contraction of the uterus, so the patient will experience increased abdominal distension and pain and increased bleeding, and even shock in serious cases. Symptoms of miscarriage should be seen promptly and evaluated by a doctor for fertility treatment or management. The HCG value will gradually drop to normal as the condition develops. At this time, the patient needs to pay more attention to rest, not to be overly fatigued, and follow the doctor’s instructions for treatment and care, in addition to strengthening nutrition, eating more fresh vegetables and fruits, eggs, milk, meat, etc.