Causes of Stomach Pain in Pregnant Women There are many causes of tummy ache in pregnant women, some common causes include contractions, fetal movements, digestive issues and vaginal infections. Uterine contractions are a common condition experienced by pregnant women during pregnancy. They can appear as the pregnancy progresses and may become more frequent. In some cases, contractions may be accompanied by pain and discomfort. Fetal movements may also cause abdominal pain in pregnant women. This is usually caused by movement of the fetus in the womb. Digestive problems are another common cause. Pregnant women may experience nausea, vomiting, and diarrhea, which are symptoms of