Chapter on Menstruation, Istihada (abnormal bleeding), and Nifas (postpartum bleeding)

Ahmad bin Muhammad, who raised it to Zur'ah, from Sama'ah, who said: I asked Imam عليه السلام about a young girl who experienced her first menstruation, and her bleeding lasted for three months, and she did not know the days of her cycles. Imam عليه السلام said: "Her cycles should follow the pattern of the women in her family. If the women in her family have different cycles, then the maximum period she should observe is ten days, and the minimum is three days."