If you are 33 weeks pregnant and feel your stomach dropping, most of them are caused by false contractions, which is a normal phenomenon and you don’t need to worry too much. If it is accompanied by other abnormalities, you can consult a doctor in time for examination and treatment of the cause.1. Pseudocontractions: In the middle and late stages of pregnancy, due to the uterus increasing in size, the amniotic fluid increasing, the head of the fetus beginning to fall and the fetus moving frequently, the pregnant woman often feels the abdomen falling, the back is flexed. If the same position is maintained for a longer period of time, there will be an irregular hardening of the abdomen, which is a false contraction. If there is only a feeling of falling, ultrasound shows no abnormality, there is no redness, and there is no effective contraction on fetal heart rate monitoring, the feeling of falling stomach can be gradually relieved through proper rest; 2. Preterm labor with precocious labor: If there is frequent and regular abdominal swelling or accompanied by redness and water breakage, it is suggestive of preterm labor with preterm labor, and requires immediate hospital consultation. Perform ultrasound and fetal heart rate monitoring to see if the fetus and its appendages are normal, and to see if the contractions are effective. If the contractions are frequent and the ultrasound shows shortening of the cervical canal, preterm labor is present. Since the survival rate of 33-week-old fetus is low after birth, timely treatment of fetal preservation and promotion of fetal lung maturation is required. Therefore, after the abdominal drop sensation, pregnant women can take appropriate bed rest, avoid prolonged standing and sitting, reduce unnecessary activities or strenuous exercise, and can also use abdominal band to support the abdomen to relieve the pressure symptoms. If the symptoms continue to be unrelieved, it is necessary to seek timely medical treatment.