Swollen calves in pregnant women are caused by the compression of blood vessels in the lower half of the body as the uterus becomes larger, affecting the blood circulation of capillaries.
Every pregnant woman will experience swelling, either lightly or heavily, and it is more likely to be caused by standing for long periods of time at work, walking back and forth, or continuing in the same position unchanged.
If you have swollen legs, you should rest in bed while using a pillow or cushion to elevate your legs, the swelling will naturally go away; if the swelling always does not improve and you gain weight rapidly and develop symptoms such as high blood pressure and proteinuria, you need to be examined and treated immediately.