Having contractions in the nineteenth week of pregnancy may be normal occasionally, while frequent occurrences are abnormal and require prompt medical attention. False contractions may occur during mid-pregnancy. False contractions are due to the greater sensitivity of the myometrium during pregnancy, and will occur irregularly with less intensity, which is a normal physiological condition, and can be triggered by emotional excitement, overwork, and other factors, and can be relieved with rest. If the contractions are frequent and painful, accompanied by vaginal bleeding, running water, shortening and opening of the cervical canal, these are abnormal, suggesting the occurrence of preterm miscarriage or difficult to avoid miscarriage, and need to consult a doctor in time. Abnormal contractions during pregnancy require prompt medical attention, complete the relevant examinations, and active treatment under the guidance of the doctor.