Dark green stool during pregnancy is related to taking iron-containing drugs, eating animal blood products, and excessive intake of green vegetables, and some pregnant women need to be alert to gastrointestinal bleeding. Many pregnant women during pregnancy will be physically anemic, need to take iron-containing drugs to improve, iron drugs when taking the body can not be fully absorbed iron, part of the iron will enter the digestive system, the digestive tract oxidized to ferrous sulfate, resulting in discharge of feces appear dark green. Eat a lot of animal blood products during pregnancy, such as pig’s blood, duck’s blood, because the food contains a lot of iron, the feces will also be affected by the color, mainly in the color of black. Eat a lot of green vegetables during pregnancy, such as spinach, capers, leeks, vegetables contain a lot of chlorophyll, the color of feces will also be affected by the change and appear dark green. Some pregnant women appear dark green stool, accompanied by severe abdominal pain, should be timely routine stool examination, in order to avoid is caused by gastrointestinal bleeding.