Round ligament pain is a sharp pain or jabbing feeling often felt in the lower belly or groin area on one or both sides. It is one of the most common complaints during pregnancy and is considered a normal part of pregnancy. It is most often felt during the second trimester.

Causes of Round Ligament Pain
Several thick ligaments surround and support your womb (uterus) as it grows during pregnancy. One of them is called the round ligament.

Baby's Growth and Development in the Second Trimester of Pregnancy
The round ligament connects the front part of the womb to your groin, the area where your legs attach to your pelvis. The round ligament normally tightens and relaxes slowly.

As your baby and womb grow, the round ligament stretches. That makes it more likely to become strained.

Sudden movements can cause the ligament to tighten quickly, like a rubber band snapping. This causes a sudden and quick jabbing feeling.