1. What is edema? Edema refers to the swelling caused by fluid retention in body tissues. In pregnant women, due to the gradual increase in pregnancy, the blood vessels in the pelvic cavity and lower limbs are compressed, causing obstruction of venous return, causing congestion and edema in the lower limbs. 2. Symptoms of edema in pregnant women The main manifestation of edema in pregnant women is edema of the lower limbs, especially at the ankles, which is more obvious at night. It will also be accompanied by