Source: The Great Interpretation of Dreams (Ibn Sirin)
Menstruation in a dream for a woman indicates committing a sin or negligence in religion. For a man, it indicates committing a forbidden act.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Menstruation indicates illness or separation. If the woman is pregnant, she will miscarry.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Menstruation is interpreted as worry and deficiency in religion.