What percentage of women who develop varicose veins while pregnant keep the veins?

All of them: Varicose veins have lost their normal function and carry blood the wrong direction. Once veins become abnormal, they are never able to "heal" and fully achieve normal function again. This is true, regardless of the cause--even pregnancy. After delivery, many of these veins shrink, often to the point of being unapparent, but they are never fully normal again. They are just much smaller.

100%: Pregnancy, like heredity, obesity, aging, lifestyle (prolonged standing or sitting) are risk factors for development of vv. Once vv develop they only get worst with time. Pregnancy increases the blood volume making the vv more prominent, and after delivery they may not be as obvious, but they are still there. Suggest visiting a phlebologist to fix the vv problem.

All : Varicose veins are due to leaking (refluxing) of the valves usually of the saphenous system. During pregnancy these valves stretch and the reflux begins. Following pregnancy the pressure on the valves is lessoned but the damage has been done. Over time, the reflux will usually again worsen and the varicose veins will return.