Pelvic pain during pregnancy is extremely common and, in most cases, completely normal. Studies from around the world put the prevalence anywhere from 34% to 76% of pregnancies, depending on the population. That wide range reflects different definitions and measurement methods, but the takeaway is clear: if you’re pregnant and your pelvis hurts, you’re far from alone. The pain has well-understood physical causes and usually resolves after delivery.
That said, not all pelvic pain is the same. Some types are a routine part of your body adapting to pregnancy, while others signal something that needs prompt attention. Understanding the difference is what matters most.
Why Pregnancy Causes Pelvic Pain
Your body produces a hormone called relaxin during pregnancy. Its job is to loosen the muscles, ligaments, and joints around your pelvis so your body can eventually make room for delivery. The trade-off is that this loosening can make your pelvic joints feel unstable, weak, or outright painful well before labor begins. The effect is most pronounced at two joints: the pubic symphysis (the joint at the front of your pelvis) and the sacroiliac joints (where your spine meets your pelvis in the back).
On top of hormonal changes, your uterus is growing and getting heavier. That shifts your center of gravity forward, puts new strain on your lower back and pelvis, and stretches the ligaments that support your uterus. The combination of joint loosening, weight redistribution, and ligament stretching explains why pelvic pain can show up as early as the first trimester and intensify as pregnancy progresses.
Round Ligament Pain
Round ligament pain is one of the most common and recognizable types of pregnancy pelvic pain. The round ligaments run from either side of your uterus down into your groin, and as your uterus expands, these ligaments stretch and sometimes spasm. The result is a sharp, stabbing, or pulling sensation in the lower pelvis or groin area, often on one side. It can also feel like an ache or a cramp.
This type of pain most often shows up during the second trimester (weeks 14 through 27), though it can appear earlier or later. It typically hits during sudden movements: standing up quickly, coughing, sneezing, laughing, or rolling over in bed. The pain is usually brief, lasting seconds to minutes, and resolves on its own. Moving more slowly during position changes often helps.
Pelvic Girdle Pain and SPD
Pelvic girdle pain is a broader term for pain that affects the front of your pubic bone, one or both sides of your lower back, or all of these areas at once. When the pain centers on the pubic symphysis joint at the front of your pelvis, it’s sometimes called symphysis pubis dysfunction, or SPD. Many providers now use “pelvic girdle pain” as the umbrella term because the discomfort rarely stays in one spot.
Pelvic girdle pain tends to be more persistent than round ligament pain. Common symptoms include:
- A sensation that your pelvis feels loose or wobbly
- Pain when climbing stairs, getting out of a car, or standing on one leg
- A clicking or grinding sound from your pelvis
- Shooting pain from the front or back of your pelvis
- Steady pain radiating into your lower back, groin, or inner thigh
In one Australian study of 780 women, 44% reported pelvic girdle pain at some point during pregnancy. A Spanish study found a rate of nearly 65% in women up to 35 weeks. These numbers make it one of the most common pregnancy complaints, yet it often goes unmentioned in routine prenatal care. If pelvic girdle pain is interfering with your daily life, it’s worth bringing up with your provider, because effective management options exist.
What Helps With the Pain
Small changes to how you move, sit, and sleep can make a noticeable difference. For sleeping, lying on your side with a pillow between your knees reduces strain on your hips and pelvis. As your belly grows, placing an extra pillow or rolled-up towel under your bump helps even more. If your hips ache at night, your mattress may be too firm; a mattress topper or a folded duvet underneath you can soften the pressure.
When sitting, avoid perching on the edge of a chair. Sit well back, use the chair’s full support, and place a small cushion or rolled-up towel at your lower back. You don’t need to sit ramrod straight, which can strain your back just as much as slouching. Aim for something in between. When standing, distribute your weight evenly through both feet rather than leaning onto one hip.
Getting out of bed deserves its own technique: roll onto your side first, drop your legs over the edge, then push up with your hands and elbow. When turning in bed, bend your knees, engage your core, and move your shoulders and hips together as one unit rather than twisting.
Exercise also helps. Deep squats open and relax the hips and pelvis. You can support yourself with pillows, yoga blocks, or a low stool, and hold each squat for about a minute while practicing deep belly breathing. Lateral breathing exercises, where you sit with a cushion between your knees and focus on expanding your rib cage with each inhale, help relax the pelvic floor. Some women benefit from pelvic floor physical therapy, where a specialist can assess your specific pain pattern and design a targeted exercise program. Starting perineal massage around 34 weeks can also help prepare the pelvic floor muscles for delivery.
How to Tell It’s Not Just Normal Pain
Most pregnancy pelvic pain is musculoskeletal, meaning it comes from your joints, ligaments, and muscles adapting to pregnancy. But pelvic pain can also be a symptom of a urinary tract infection, which is more common during pregnancy. The key difference is that UTIs come with urinary symptoms: a burning sensation when you pee, a frequent or urgent need to urinate even when little comes out, and urine that looks cloudy, dark, or smells unusually strong. Musculoskeletal pain, by contrast, changes with movement and position but has nothing to do with urination.
The CDC identifies several warning signs that mean pelvic or abdominal pain needs immediate medical attention:
- Sharp or cramp-like belly pain that doesn’t go away, starts suddenly, or gets worse over time
- Vaginal bleeding heavier than light spotting
- Fluid leaking from your vagina, whether a gush or a steady trickle
- Vaginal discharge with a foul smell
- A fever of 100.4°F (38°C) or higher
Pelvic Pressure vs. Preterm Labor
In the third trimester, many women feel a heavy pressure low in the pelvis as the baby drops lower. This is normal, especially in the final weeks. But pelvic pressure is also listed among the symptoms of preterm labor (labor before 37 weeks), which is why it can feel alarming.
The distinction comes down to pattern and accompanying symptoms. Normal late-pregnancy pressure tends to be constant, dull, and related to position. Preterm labor involves regular or frequent contractions, a feeling of belly tightening that comes and goes rhythmically, a persistent dull low backache, and sometimes vaginal spotting or a change in discharge (watery, bloody, or mucus-filled). If you’re before 37 weeks and notice any of these in combination with pelvic pressure, contact your provider right away. They can check your cervix and determine whether what you’re feeling is true labor or the normal heaviness of a growing baby.