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It’s best not to. Some studies suggest that using saunas and hot tubs early in pregnancy, especially for long periods of time, is associated with birth defects. Your core body temperature rises when you use saunas and hot tubs. This rise in temperature can be harmful for your fetus.

Read more about reducing risks of birth defects.

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Published: September 2021

Last reviewed: September 2021

Copyright 2021 by the American College of Obstetricians and Gynecologists. All rights reserved. Read copyright and permissions information.

This information is designed as an educational aid for the public. It offers current information and opinions related to women's health. It is not intended as a statement of the standard of care. It does not explain all of the proper treatments or methods of care. It is not a substitute for the advice of a physician. Read ACOG’s complete disclaimer.