In the middle of pregnancy, black green stool is considered to be related to the usual diet, or taking some medication, such as taking iron supplementation or medication for stomach problems, which can easily lead to black stool. If you usually eat more green vegetables, such as eating spinach, leek, celery, these green vegetables can easily lead to black green stools. If there is indigestion, black-green stools can also occur. During this period, as long as there is no stomach pain, it is generally a physiological manifestation, do not need to be too nervous, try to eat lightly, pay attention to the observation can be. If you have black and green stools with pain in the stomach, it is considered to be a symptom of indigestion. You can eat bifidobacterium to regulate the effect.