The correct way to wear a seatbelt during pregnancy is to buckle the lap belt below your belly, snug across your hips and pelvic bone, and run the shoulder belt between your breasts and over the middle of your collarbone. This positioning keeps the force of a crash on your strongest bones and away from your uterus. Properly wearing a seatbelt reduces the risk of adverse fetal outcome by 84%.
Exact Belt Placement
The lap belt goes as low as possible, sitting firmly on your hip bones (the bony ridges you can feel at the front of your pelvis). It should never ride up over your bump, no matter how far along you are. As your belly grows, you may need to adjust the belt each time you get in the car because it naturally wants to migrate upward.
The shoulder belt crosses your chest diagonally, passing between your breasts and over the middle of your collarbone. Keep it away from your neck but never tuck it under your arm or behind your back. Both portions of the belt need to stay on. Wearing only a shoulder belt or only a lap belt is considered improper restraint and offers far less protection. In one documented crash, a pregnant passenger wearing only a shoulder belt died from internal injuries in what was otherwise a minor frontal collision.
Pull any slack out of the belt so it sits flat against your body. A loose belt can shift during a crash, concentrating force in the wrong place.
Why Placement Over the Belly Is Dangerous
When a lap belt sits on top of the abdomen instead of below it, a collision drives the belt directly into the uterus. This creates two problems. First, the sudden compression changes the curvature of the uterine wall, producing shearing forces at the boundary where the placenta attaches. Second, the impact generates a pressure wave through the amniotic fluid that pulls the placenta away from the uterine lining. Both mechanisms can cause placental abruption, where the placenta detaches prematurely. Abruption causes severe bleeding and can be fatal for the baby.
Research using crash simulation models found that positioning the seatbelt on the hip bones prevented severe placental abruption regardless of where the placenta was located inside the uterus. Belt placement over the abdomen, by contrast, produced a high risk of abruption even at moderate crash speeds.
How Much Seatbelts Actually Help
Unbelted pregnant occupants account for an estimated 62% of all fetal deaths in car crashes, despite making up only about 20% of drivers. The math is stark: if every pregnant person in the U.S. buckled up properly, roughly 192 fetal losses per year could be prevented.
In severe crashes, outcomes are poor regardless of restraint use. But in the low- and moderate-severity collisions that make up the vast majority of accidents, proper belt use is the single biggest factor separating good outcomes from bad ones. In one analysis, the only two acceptable fetal outcomes among unrestrained women occurred in crashes classified as minor severity.
Steering Wheel and Seat Position
Car manufacturers recommend at least 12 inches between your chest and the steering wheel to allow the airbag to deploy safely. As your belly grows in the third trimester, this distance can shrink. Slide your seat back as far as you can while still comfortably reaching the pedals, and tilt the steering wheel upward so it points toward your chest rather than your abdomen. If you can no longer maintain that 12-inch gap, consider having someone else drive when possible.
Airbags are safe during pregnancy and should stay turned on. They’re designed to work together with a seatbelt, not replace one.
Aftermarket Seatbelt Adjusters
Several products marketed to pregnant drivers claim to redirect the lap belt between your thighs or hold it lower on your hips. None of these devices have been adequately crash-tested. The U.S. National Highway Traffic Safety Administration does not regulate aftermarket belt adjusters because they fall outside existing safety standards. At least one manufacturer has claimed safety approval from both NHTSA and the Australasian New Car Assessment Program, but both organizations told Consumer Reports those claims are false.
Without independent crash testing, there’s no way to know whether these devices improve safety or introduce new risks. The standard seatbelt, worn correctly, remains the best-validated option.
Long Drives During Pregnancy
Pregnancy increases your risk of blood clots, and sitting in a car for hours compounds that risk. On trips longer than an hour or two, stop to walk around and stretch your legs. Between stops, flex your ankles by pulling your toes toward you, or do calf pumps with your feet on the floor. These small movements keep blood circulating in your lower legs.
Keep your seatbelt on for the entire drive, even if it feels uncomfortable. Shifting the lap belt to a more “comfortable” position on your belly trades minor discomfort for a significant safety risk.
After a Crash at Any Speed
Even a fender bender can cause complications that aren’t immediately obvious. Placental abruption sometimes develops hours after impact, and the earliest signs are vaginal bleeding, abdominal pain, or contractions. The force needed to cause abruption can be surprisingly small, so “it was just a minor accident” isn’t a reliable way to gauge risk.
Any pregnant person involved in a collision should be evaluated by a medical professional, regardless of how they feel at the scene. Monitoring typically includes checking the baby’s heart rate and watching for contractions over a period of observation. The sooner abruption is caught, the better the options for managing it.