AJ PHOTO / SCIENCE PHOTO LIBRARY AJ PHOTO / SCIENCE PHOTO LIBRARY
Menstrual pain. Lower abdominal and pelvic pain, known as dysmenorrhoea, may occur before or during a menstrual period. During menstruation, strong uterine contractions cause the menstrual discharge to be expelled. At ovulation, abdominal pain may be felt when an egg is forcibly expelled from an ovary.
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