Is the blood that came down to the woman—who has uterine fibroids and whose menstruation has been interrupted for three months and twelve days—considered menstrual blood that necessitates abandoning prayer and fasting, or is it istihadah (non-menstrual vaginal bleeding)?

The blood that prevents prayer, fasting, and intercourse is menstrual blood, and it has characteristics: it is black, has an unpleasant odor, and is thick. Any blood other than that is istihaadah (non-menstrual bleeding) and does not prevent prayer, fasting, or intercourse. Based on the questioner's description, this blood is not menstrual blood, and she must pray and fast, and her husband is permitted to have intercourse with her.