The ruling on dark blood before and after purity

Question : And the opinion of a sister who asks, saying in her question: For the past two years, I have had a miscarriage. After the miscarriage, my menstrual cycle became irregular. For the first three days, there is blood, and for the last three days, there is nothing. Purity appears on the sixth day, and on the seventh day, brown, dark blood comes out of me, and it lasts for four days. Is it permissible to sit [i.e., not pray or fast] during this period or not?

Answer : As for the final period after purity, if the blood is not the blood of the menses, and it is not menstruation, then she may fast and pray, and there is no blame on her. As for what comes before purity, it is part of the menstruation, even if it is yellow or dark, as long as it is connected to the blood of menstruation, it is considered part of the menstruation. For this reason, Umm Atiyyah (may Allah be pleased with her) said: "We did not count the yellow or dark discharge after purity as anything." As for what comes before purity, as long as it follows the menstruation and is connected to it, it has the rulings of menstruation.