This document discusses menstruation and different types of menstrual bleeding in women. It describes menstruation as a discharge from the womb that is usually thick, warm, and dark red or black in color, lasting 3 to 10 days. It categorizes levels of menstrual bleeding as light (little), medium (moderate), or heavy (excessive). It outlines rules regarding prayers, Quran touching, mosque entry, and other acts during menstruation and postpartum bleeding. Certain acts like prayer and Quran touching require purification like ghusl or wudu, while mosque entry may be prohibited.