just found this for you...hope it helps
Swollen feet, ankles, legs and hands are common symptoms of pregnancy. You may notice the rings on your fingers feel tight. This swelling happens when the body retains water, which is caused by a couple of changes in the body during pregnancy.
As the uterus enlarges, it presses down on the main veins to the legs. This reduces the flow of blood returning to the heart, which pushes the water into the tissues into the legs and feet.
If you suffer from high blood pressure, as many women do during pregnancy, additional water can be pushed into the body tissues. If you have high blood pressure, your doctor will closely monitor your condition for signs of preeclampsia.
Contributing to your discomfort are increased levels of the hormoneA complex chemical substance created in a part or organ of the body. When released it initiates or regulates activity in an organ or group of cells in another part of the body.
Hormones secreted by endocrine glands are transported through the bloodstream to their target organ. The amount of hormone secreted is regulated either by other hormones, by neurotransmitters, or simply when an excess of the organ's activity indicates a need to reduce the amount of the hormone produced.
Other hormones are produced locally by the organs themselves and are common in the digestive tract.