Thank you for the query.
can appear due to pregnancy
. So it some cases it can be a symptom of it.
However black stools are rather unlikely to be a symptom of pregnancy. Always when black stool appears (especially tarry like) it should be checked with bleeding from upper digestive tract. Bleeding from peptic ulcer
usually appears in such way.
Other possible reason of black stool is Iron supplements
So if your stool is tarry like and you have been suffering from upper abdominal pain
, I suggest you to visit your doctor, have blood work and upper GI endoscopy performed.
Hope this will help.