Is blood discharged after an injection to remove ectopic pregnancy cells considered menstruation or istihadah (non-menstrual bleeding), taking into account the color and quantity of the blood and the date of the previous menstrual period?

The blood resulting from a miscarriage is considered nifas (postnatal bleeding) if human features are discernible in the fetus, and the woman is then considered to be excused from prayer and fasting due to it. However, if human features are not discernible in the fetus, then the blood is considered istihada (irregular bleeding), unless it coincides with the woman's usual menstrual period, in which case it is considered menstruation.