What causes constant fetal movement at seven months of pregnancy?

At seven months of pregnancy, persistent fetal movement is generally reassuring. If umbilical cord entanglement and reduced amniotic fluid—both potential causes of intrauterine hypoxia—have been ruled out, frequent, rhythmic, and regular fetal movements with minimal variation in frequency typically indicate normal fetal development. However, if the expectant mother has concerns, she should consult a local maternal and child health hospital for professional, targeted examinations to identify any underlying causes.