Round ligament pain is felt in the lower abdomen, groin, and sometimes the hips during pregnancy. It most commonly shows up as a sharp, sudden sensation on one or both sides of your belly, below the belly button and toward the bikini line. The right side tends to be affected more often because of how the uterus naturally tilts and grows, but plenty of people feel it on the left or on both sides.
Exactly Where the Pain Shows Up
The round ligaments are two rope-like bands that run from the front of your uterus down through the groin and into the labia. Think of them as anchoring cords that hold the uterus in place. As your uterus grows from roughly the size of a pear to the size of a watermelon, these ligaments stretch and thicken to keep up. That stretching is what produces the pain.
Most people feel it in a diagonal band from the lower belly to the crease where the thigh meets the pelvis. Some describe it as deep in the groin, almost like a pulled muscle. Others feel it closer to the hip bones. The pain can also radiate slightly into the upper thigh on the affected side, though it rarely travels below the mid-thigh.
What It Feels Like
Round ligament pain has two common patterns. The first is a quick, sharp, stabbing sensation that hits with sudden movement and lasts only a few seconds. The second is a duller, achy soreness that can linger for a few minutes after prolonged activity like walking or standing. Both versions are normal. The sharp type is more startling but actually less of a concern, since it resolves almost immediately once you stop moving.
When It Typically Starts
The second trimester is the classic window, particularly between weeks 14 and 20. This is when the uterus is growing rapidly and shifting from a pelvic organ into an abdominal one, putting the most sudden strain on the round ligaments. Some people notice it as early as the late first trimester, and it can continue into the third trimester, though by then other types of pelvic and back pain tend to take center stage.
Movements That Trigger It
Almost anything that tugs on the ligaments quickly can set off an episode. The most common triggers are sneezing, coughing, laughing, rolling over in bed, and standing up too fast from a seated position. Exercise involving sudden direction changes, like chasing a toddler or turning sharply while walking, is another frequent cause. Even a strong stretch first thing in the morning can do it.
The key pattern is that the pain is motion-related. It comes on with a specific movement and fades when you stop or change position. Pain that persists regardless of what you’re doing points to something else.
How to Get Relief
Slowing down transitions is the simplest fix. When you need to sneeze or cough, try gently bending your hips forward or pressing a hand against your lower belly to brace the ligaments. When getting out of bed, roll to your side first and push up with your arms rather than sitting straight up.
Gentle stretching helps too. Getting on your hands and knees and slowly arching and rounding your back (the cat-cow movement) takes tension off the ligaments. Pelvic tilts, where you lie on your back with knees bent and gently flatten your lower back into the floor, can also reduce the pull. A warm (not hot) bath or heating pad on the lower belly for 10 to 15 minutes often eases a lingering ache.
Maternity support belts are another option. These sit below the belly and work by lifting some of the uterine weight off the pelvis, reducing the downward pull on the ligaments. Research on these garments suggests they help by stabilizing the pelvis, improving posture, and redistributing mechanical load. They won’t eliminate the pain entirely, but many people find they make long walks or active days more comfortable.
How It Differs From Serious Pain
Because round ligament pain sits in the right lower abdomen and groin, it can mimic conditions that need urgent attention, particularly appendicitis. In one published case, a woman at 33 weeks of pregnancy had right lower quadrant pain that was initially attributed to round ligament strain. Over the following days, her pain worsened, she developed a fever, and her condition deteriorated before appendicitis was diagnosed.
The distinguishing features of round ligament pain are that it’s brief, triggered by movement, and resolves with rest. It doesn’t come with fever, chills, nausea, vomiting, or pain that steadily worsens over hours regardless of position. It also doesn’t involve vaginal bleeding or fluid leaking.
Contact your healthcare provider if you experience a fever of 100.4°F or higher, pain lasting more than a few minutes that doesn’t ease with position changes, pain that gets progressively worse, or any bleeding, nausea, or vomiting alongside the abdominal pain. These symptoms can indicate appendicitis, ovarian torsion, placental abruption, or preterm labor, all of which require prompt evaluation.