Final answer:
Menorrhagia is the term that describes excessive uterine bleeding at the usual time of menstrual periods as well as at irregular intervals.
Step-by-step explanation:
The term that refers to excessive uterine bleeding at both the usual time of menstrual periods and at other irregular intervals is known as menorrhagia. Menorrhagia is a condition that can be caused by hormonal imbalances, uterine abnormalities such as fibroids or polyps, disorders of the blood clotting system, and some medical conditions like polycystic ovary syndrome (PCOS) or endometriosis.
In endometriosis, the tissue that usually lines the inside of the uterus grows outside it, leading to pain and irregular bleeding. A thorough evaluation by a healthcare professional is essential for proper diagnosis and treatment.
During the menopausal transition, often called peri-menopause, hormonal changes can lead to a reduced level of progesterone, which can, in turn, cause hyperplasia of the endometrium. This abnormal growth increases the risk of endometrial cancer and can manifest as irregular bleeding. Factors such as changes in diet or an underlying hormonal disorder like PCOS can also contribute to abnormal uterine bleeding patterns.