hi and pleased to answer you ton of blood and large blood colts in the toilet or (hypermenorrhea) correspond to abnormally abundant and prolonged menstruation. This is the most common menstrual disorder reported by women. The amount of blood normally lost during menstruation is about 2 oz (4 tbsp) and the usual duration varies between 3 and 7 days. A woman with menorrhagia may lose up to 3 oz (6 tbsp) or more and sometimes over a period of more than 7 days. Menorrhagia is sometimes accompanied by abdominal pain that affects the quality of life of women who suffer from it. In some cases, it may be responsible for anemia. The most common origin of unusual vaginal bleeding is hormonal fluctuation. The secretion of estrogens and progesterone influences the growth of the endometrium and ovulation; Their fall in the blood causes the appearance of the rules. But it happens that ovulation does not occur (anovulatory cycle) or later. The endometrium then continues to form, until the uterus eventually expels it. The endometrium has therefore developed longer and there is more thickness to eliminate, which results in menorrhagia. Cycles without ovulation are common in early adolescence and perimenopause but they can also occur anytime until menopause. A delayed period of more than 15 days with severe bleeding can sometimes be a miscarriage. In this case, a pregnancy test must be done. Other causes: -Benign tumors in the uterus, such as uterine fibroids or polyps. -Taking a hormonal treatment (contraception, menopause treatment, fertility treatment) can lead to menorrhagia and irregular bleeding (spotting or bleeding) -Users of intrauterine devices (IUDs) may have much more abundant menstruation. - Endometriosis, abnormal development of endometrial tissue outside the uterus, may be linked to abundant menstruation, evacuated through the tubes and not through the vagina. Severe abdominal pain after menstruation in the days following cessation of bleeding is highly suggestive of endometriosis; -Unusual bleeding in women over the age of 40 who use no contraception may be related to inflammation or cervical cancer and require consultation as soon as possible. -Bleeding in a postmenopausal woman is not menorrhagia. These are haemorrhages and must prompt consultation. -Bleeding in a pregnant woman are never menorrhagia, since a pregnant woman has no menstruation. These bleeds should prompt medical attention. I ask you to consult a gynecologist. best wishes