MARTIN RIEDL / SCIENCE PHOTO LIBRARY MARTIN RIEDL / SCIENCE PHOTO LIBRARY
Stomach pain. Woman holding her abdomen in pain. Abdominal pain has many causes, including constipation or indigestion. In this case it could be caused by the cramps that happen during a woman's menstrual cycle. These cramps are the strong uterine contractions that expel the lining from the uterus. Pain may also be experienced when the egg is expelled from an ovary (ovulation).
Model release not required. Property release not required.