Pelvic Congestion Syndrome is associated with restricted blood flow in the pelvic area. When the body changes during pregnancy, the veins may be damaged. The veins may lead to malfunctioning organs which can affect fertility. Dysfunctional pelvic veins do not close properly, causing backflow and interruption of bodily functions. This condition causes chronic pelvic pain since the twisted veins cannot handle the sudden onset of blood. See "What causes Pelvic Congestion Syndrome" section above for a detailed explanation.