Frequent fetal movement at 21 weeks is divided into physiological and pathological causes.
1. Physiological reasons. Frequent fetal movement at 21 weeks of pregnancy may be related to the fact that the fetus is relatively small and has enough space to move in the uterine cavity, in addition, frequent fetal movement may also occur after eating or listening to music. Generally, frequent fetal movement will return to normal on its own, which is a physiological phenomenon.
2. Pathological reasons. Fetal movement in 21 weeks of pregnancy may be due to maternal hypertension, heart disease or anemia and other diseases, resulting in insufficient maternal blood oxygen content, fetal intrauterine hypoxia; it may also be related to the umbilical cord around the neck, placental insufficiency and other causes of fetal hypoxia.
Pathological causes of frequent fetal movements, if the cause is not eliminated, frequent fetal movements will gradually decrease or disappear, need to be given timely oxygen to improve, and actively treat the primary disease.