According to the description of the symptoms, may be related to the food recently eaten, food containing pigment, will affect the color of the stool, recently ate a lot of green vegetables, or iron rich food, will cause the phenomenon of black and green stool, will not affect the growth and development of the fetus, do not need to worry about too much. It can also be caused by indigestion, during pregnancy, the human hormone level changes greatly, the content of progesterone increases, will make the gastrointestinal tract smooth muscle relaxation, pancreatic sphincter relaxation, gastric acid secretion is reduced, coupled with the uterus oppression, it will produce gastric bloating, indigestion, which triggered the symptom of black and green stools. The mixture of pus in the stool is considered to be acute enteritis, it is recommended to go to the regular hospital to check the stool routine and occult blood, to see if there are pathological factors, timely treatment, as a pregnant woman should pay more attention to the body, on time for the maternity examination, to ensure enough rest and healthy diet.