Pregnancy and hot tubs can be a dangerous combination.
Spending 10 minutes or more in a hot tub can raise your body temperature to 102 F (38.9 C), causing a condition known as hyperthermia. Some studies have shown an increased risk of miscarriage and neural tube defects — serious abnormalities of the brain or spinal cord — in the babies of women who experience high temperatures during the first four to six weeks of pregnancy.
If you might be pregnant and plan to use a hot tub, or you choose to use a hot tub during pregnancy, take these steps to reduce the risks:
- Limit time in the hot tub to less than 10 minutes.
- Avoid sitting near the inlet that provides newly heated water.
- Avoid spending time in the hot tub once a week or more.
- Get out of the hot tub if you start to sweat or feel any discomfort.
- Stay out of the hot tub if you aren't in good health or you already have an elevated temperature due to fever, exercise, or previous hot tub or sauna use.
If you used a hot tub for a lengthy period of time early in pregnancy, consider talking to your doctor about ways to detect neural tube defects during pregnancy.
Dec. 08, 2012
- Chambers CD. Risks of hyperthermia associated with hot tub or spa use by pregnant women. Birth Defects Research Part A: Clinical and Molecular Teratology. 2006;76:569.
- Li De-Kun, et al. Hot tub use during pregnancy and the risk of miscarriage. American Journal of Epidemiology. 2003;158:931.
- Hyperthermia and pregnancy. Organization of Teratology Information Specialists. http://www.otispregnancy.org/files/hyperthermia.pdf. Accessed Sept. 4, 2012.
- Moretti ME, et al. Maternal hyperthermia and the risk for neural tube defects in offspring: Systematic review and meta-analysis. Epidemiology. 2005;16:216.
- Shahrukh Hashmi S, et al. Maternal fever during early pregnancy and the risk of oral clefts. Birth Defects Research Part A: Clinical and Molecular Teratology. 2010;88:186.