Reviewed by Brian R. Robinson, MD
In right ovarian vein syndrome, the right ovarian vein becomes larger than the left, and the valves of the vein become enlarged and stop normal functioning. This disorder occurs or begins primarily during pregnancy.
The ovarian veins are a pair of veins that come from the ligament that supports the ovaries and Fallopian tubes. Sometimes, the rightmost of these two veins, as well as the one-way valves that prevent backflow and pooling of blood, become enlarged, causing a number of symptoms.
Causes of right ovarian vein syndrome include the enlargement of the kidney due to backup or retention of urine (hydronephrosis), or kidney infection (pyelonephritis), both of which occur more often during pregnancy.