Cold weather and snow shoveling during pregnancy

What does the evidence say about shoveling snow and cold weather exposure during pregnancy?

1. Cold weather puts extra strain on the heart, and CDC guidance specifically names shoveling snow as one of the hard outdoor chores that combines with cold exposure to raise cardiac risk. Anyone with heart disease or high blood pressure is told to follow their doctor's advice before shoveling, and everyone else is told to dress warmly and work slowly to avoid overexertion. 1
2. A Canadian analysis found that the quantity and duration of snowfall were associated with a rise in hospital admissions and deaths from heart attack, and a separate review of 500 acute coronary events found 7% occurred right after snow-shoveling, with that shoveling-related group far more likely to be male and to have a family history of early heart disease. This evidence comes from general, largely older and male populations rather than pregnancy specifically, which supports caution around unaccustomed heavy cold-weather exertion rather than a pregnancy-specific risk estimate. 2
3. Falls happen in a meaningful share of pregnancies, with studies cited in one cross-sectional review finding rates between about 13% and 27% depending on the population studied, and weight gain, increased ligament laxity, and reduced abdominal muscle control are identified as physiological reasons pregnancy itself shifts balance and posture control. 3
4. Hypothermia warning signs include shivering, exhaustion, confusion, fumbling hands, memory loss, slurred speech, and drowsiness, while frostbite often starts as redness or pain in exposed skin before turning white or grayish-yellow. CDC guidance calls for layered, water-resistant clothing along with a hat, mittens, and a scarf or mask covering the face for anyone spending real time outdoors in the cold. 4
5. CDC guidance specifically warns not to ignore shivering, calling it an important first sign the body is losing heat, a useful early cue to head inside or add a layer before cold exposure progresses toward true hypothermia. 1

Is shoveling snow and cold weather exposure safe in each trimester?

• First trimester. Early pregnancy doesn't change how your body handles cold or exertion very much, but fatigue and nausea can make it harder to gauge how hard you're actually working. If shoveling ever leaves you short of breath, dizzy, or with chest pain or tightness, stop and get evaluated rather than pushing through.
• Second trimester. As your center of gravity starts shifting, the same icy sidewalk gets riskier than it was before pregnancy. Weight distribution changes and increased ligament laxity make a slip more consequential, so this is a good trimester to hand off the shoveling and focus on cautious, well-supported walking instead.
• Third trimester. Late pregnancy combines the most pronounced balance changes with the least reserve for cardiovascular strain or a hard fall. This is the trimester to be most conservative: let someone else clear the snow, salt or sand your own walkways, and wear real winter traction underfoot for any outdoor trip.

Cold weather and shoveling: know your risk factors