"Menstruation is periodic vaginal discharge and occurs in all races available to players, as well as most mammals. Menstruation accompanies a woman’s childbearing years, usually beginning in puberty and most often ceasing during middle age. A common belief regarding menstruation is that it is punishment from the gods for being female. If pregnancy does not occur, smelly blood may flow from the lining of the uterus, seeping out of the vagina. The (1d6 + 2) days that menstruation lasts is called the menstrual period, though colloquially it is known as the rag, since women secure rags on their crotch to catch the blood and prevent it from running down their legs. In most women, the menstrual cycle is about 28 days, but it can vary considerably, even from 1 month to another. A missed period is often the first indicaton of pregnancy. Many (50%) women experience premenstrual discomfort, namely tender breasts and a tendency to retain fluid known as bloating (1d8 - 1) days prior to menstruation. Some (40%) women experience 1d6 of the following symptoms: 1) headaches, 2) irritability, 3) nervousness, 4) fatigue, 5) crying spells, and 6) depression with no apparent cause. A few women (10%) also experience menstrual cramps during the first day or 2 of the period. If they experience irritability, then the choleric part of their temperament may increase by 1d100 during menstruation. If they experience depression, then the melancholic part of their temperament may increase by 1d100 during menstruation."