Diabetes during pregnancy, compared to diabetes outside of pregnancy, still presents symptoms such as polydipsia, polyphagia, and polyuria, but does not manifest as weight loss. Due to the increase in body weight from the enlarging uterus, fetus, and amniotic fluid during pregnancy, signs of weight loss are not evident. There are generally two types of diabetes in pregnancy. One is when diabetes pre-exists before pregnancy, which is termed diabetes mellitus with pregnancy; the other is when blood sugar levels were normal before pregnancy and diabetes develops during pregnancy, known as gestational diabetes. Over 90% of pregnant women with diabetes have gestational diabetes. Those with gestational diabetes have abnormal glucose metabolism, but most can return to normal after childbirth; however, the risk of developing Type 2 diabetes in the future increases.