From the Research
Pregnant women should avoid using steam rooms due to the potential risk of maternal hyperthermia, which can increase the risk of birth defects and miscarriage, especially during the first trimester. The high temperatures in steam rooms can raise a woman's body temperature to potentially unsafe levels for her developing baby. According to a recent study 1, pregnant women can safely engage in certain activities, such as exercise for up to 35 minutes at 80%-90% of their maximum heart rate in 25°C and 45% relative humidity, without reaching a core temperature exceeding the teratogenic threshold. However, steam rooms are not explicitly mentioned as a safe option. Another study 2 suggests that hot tub or spa use during early pregnancy may increase the risk of neural tube defects, and advises women to maintain their body temperature below 38.9°C. While some studies 3, 4 provide guidance on the use of hot tubs and saunas, the most recent and highest-quality study 1 does not support the use of steam rooms during pregnancy. Instead, consider safer relaxation alternatives such as prenatal massage, gentle yoga, or warm (not hot) baths. If you're looking for ways to ease muscle tension or relax, speak with your healthcare provider about pregnancy-safe options. They may suggest specific exercises, stretches, or other techniques that can provide similar benefits without the risks associated with steam rooms. If you have a specific medical reason to use a steam room, consult your doctor first, as they may advise limited use under controlled conditions in some cases. Key points to consider include:
- Avoiding heat stress and excessive exercise during pregnancy
- Maintaining a core temperature below 39.0°C
- Choosing safer relaxation alternatives, such as prenatal massage or gentle yoga
- Consulting with a healthcare provider before using a steam room or engaging in any new activity during pregnancy.