Are the yellow and brown discharges before and after the red blood—due to the insertion of an IUD, which prolongs the menstrual period—considered menstruation, given that these yellow discharges continue even after the blood stops and the cotton comes out white?

Yellowish and brownish discharges are considered menses if they occur within the regular period or are continuous with blood. If a woman experiences purity, and then sees a yellowish discharge afterward, it is not considered menses unless it occurs within the regular period.