As your uterus grows, the ligaments that support it are pulled and stretched. This can cause dull or sharp pains on either side of your belly. These pains are most common between weeks 18 and 24. To prevent or relieve pains: Avoid moving quickly, especially at the waist. Bend toward the pain to help relieve it. Rest or change your position. There are some abdominal supports that are designed for pregnancy that can help.