Key takeaways:
Your body temperature may run a little warmer than normal when you’re pregnant. You’re also more likely to dehydrate and overheat.
Carrying a water bottle and wearing light-colored clothing can help you cool off on hot days.
Heat can affect your fetus’s health. Take steps to cool off if you’re feeling overheated and talk to your healthcare provider if you’re running a fever.
Many women feel warmer than usual when they’re pregnant. It’s normal, but can also be uncomfortable, especially during hot summer months. The tips below will help you stay cool, show you what to do if you become overheated, and tell you when to call your healthcare provider.
Take a water bottle with you wherever you go. Rachel Miller, MD, a board-certified obstetrician and gynecologist, says pregnant women can easily become dehydrated, especially over the summer. She recommends 64 oz to 96 oz of water per day.
“I explain to my patients that the uterus is a muscle. And just like the other muscles in the body, if it is not hydrated adequately, it can cramp up and present itself like contractions,” Miller says.
Becoming dehydrated can also lower your ability to sweat. Sweating is one of the ways our bodies cool off.
It’s time to take out loose-fitting, light-colored T-shirts. This helps you maintain a comfortable body temperature. Dark-colored clothing absorbs the sun’s heat whereas light colors reflect heat and sunlight.
Reach for breathable fabrics like cotton, linen, and silk. They will keep your skin feeling cooler.
If you have to be outdoors, look for shade under trees or overhangs. Take an umbrella or canopy to the beach and visit parks with picnic shelters. The key is to stay out of direct sunlight as much as possible.
Spritz your face and the front and back of your neck with water from a spray bottle. You’ll feel cooler as the water evaporates. Try using spray bottles with built-in mini fans or adding ice cubes to the water for extra cooling.
Soaking your feet for 20 minutes in cool water can help you beat the heat. You can do this at home using a small tub or at the pool. Just make sure the water temperature is moderately cool and not ice cold.
Your hormones change greatly when you’re pregnant. “These changes in hormones (such as increases in progesterone) naturally increase a pregnant woman’s temperature slightly,” says Miller.
“Other changes associated with pregnancy, such as weight gain, can also have the effect of trapped heat, making you feel even hotter,” says Miller.
What’s more, as your body temperature rises, so does the amount of sweat you make. Sweat can also make you feel hot and sticky.
Normal body temperatures typically run around 98° F, give or take a degree or less. But a pregnant woman’s body temperature may run hotter. Miller says it may not be unusual for your new baseline to be around 98.8° F.
A fever is considered a temperature greater than 100.4° F. If you run a fever, you should give your provider a call or schedule a visit. Fever, even a low-grade one, may be cause for concern during pregnancy.
Yes, overheating can be risky to your pregnancy. Miller says it can raise the risk of fetal malformations.
“The first trimester is when all the major organs are formed. And if the environment is too hot, it can negatively affect the development of essential structures, especially the brain and spine,” she says.
Exposure to extreme heat during the first 8 weeks of pregnancy can also raise the risk for noncritical heart defects. This means avoiding situations where you could be exposed to temperatures upward of 125° F, such as hot tubs and saunas.
Pregnant women should pay attention to signs of overheating like:
Headache
Dizziness
Muscle cramps
Warm skin
Nausea
Lightheadedness
Fast heartbeat
Fainting
If you feel overheated, do what you can to cool down. Sip water, find shade, or get into a tub of cool water. Miller suggests placing a cool rag on the back of your neck or lower back.
Get medical help if your symptoms worsen, you start throwing up, or you feel overheated for over an hour.
Pregnancy is a joyous time for many people, but it can also be uncomfortable. In addition to your body running warmer than normal, the summer heat can make you miserable.
A few simple steps like carrying a water bottle, misting yourself with a spray bottle, and wearing light-colored clothing can help. Take measures to cool off if you feel overheated. And don’t hesitate to call your healthcare provider if you run a fever or feel overheated for more than an hour.
American College of Obstetricians and Gynecologists. (2020). How much water should I drink during pregnancy?
American Heart Association. (2019). Summer heat brings special health risks for pregnant women.
Auger, N., et al. (2017). Risk of congenital heart defects after ambient heat exposure early in pregnancy. Environmental Health Perspectives.
Centers for Disease Control and Prevention. (2022). Heat and pregnant women.
Centers for Disease Control and Prevention. (2023). 5 ways to lower the risk of having a pregnancy affected by a neural tube defect.
City of Wilmington Office of Emergency Management. (2021). Be prepared for extreme heat.
Egloff, C., et al. (2020). Causes and consequences of fever during pregnancy: A retrospective study in a gynaecological emergency department. Journal of Gynecology Obstetrics and Human Reproduction.
Geneva, I. I., et al. (2019). Normal body temperature: A systematic review. Open Forum Infectious Diseases.
Horsager-Boehrer, R. (2021). 5 ways to manage swollen legs and feet during pregnancy. UT Southwestern Medical Center.
Middel, A., et al. (2016). Impact of shade on outdoor thermal comfort—a seasonal field study in Tempe, Arizona. International Journal of Biometerology.
National Oceanic And Atmospheric Administration. (2023). Learning lesson: Canned heat. U.S. Department of Commerce.
Soma-Pillay, P., et al. (2016). Physiological changes in pregnancy. Cardiovascular Journal of Africa.