Is an unrepeated increase in the usual days of menstruation, whether blood, yellow discharge, or brownish discharge, considered menstruation?

Sheikh Ibn Baz is of the opinion that yellowness and brownish discharge connected to menstruation during the possible time of menstruation are considered menses. However, if they are separate from it, they are not menses, and you must pray, fast, and perform ablution for every prayer. If they appear after purification, they are not considered menses, but rather istihadah (non-menstrual bleeding), which necessitates istinja’ (cleaning oneself) and ablution for every prayer, and prayer and fasting are permissible, based on the saying of Umm Atiyyah: "We did not consider the brownish or yellowish discharge after purification as anything."