What causes a very small amount of menstruation after a miscarriage?

Patient's question:

I got pregnant accidentally and had a miscarriage surgery a month ago. At first, my menstruation was relatively normal, but this month, the amount of blood has already decreased significantly. Only the first day is normal, and by the third day, it's as if there's no period at all. Could you please explain why the menstruation is so little after a miscarriage?

Doctor's answer:

After getting pregnant, if an abortion is performed once, menstruation may become lighter. This is somewhat related to the damage to the endometrium, which has not fully recovered yet. Some people may take two to three years to gradually return to normal menstruation. Alternatively, post-abortion inflammation in the uterine cavity or uterine adhesions may also lead to minimal bleeding and abdominal pain. The above information can be used for reference.

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