There are the following differences between miscarriage blood and menstrual blood: 1. miscarriage often has a history of menopause, while menstruation does not have a history of menopause. 2. miscarriage blood is basically bright red, while menstrual blood is dark red. 3. miscarriage blood has blood clots, while menstrual blood does not have blood clots. 4. miscarriage blood is often accompanied by clinical paroxysmal pain in the lower abdomen, while menstrual blood does not have paroxysmal pain in the lower abdomen, but there may be discomfort in the lower abdomen. This is the main difference between miscarriage bleeding and menstrual bleeding. This is the main difference between miscarriage bleeding and menstrual bleeding. In addition, the best way to differentiate clinically is through blood HCG, which is increased in case of miscarriage and normal in case of menstruation.