The University of Exeter was involved in carrying out the research, which analysed the results of 12 studies published up to July 2017. These reported the core temperature response of 347 pregnant women to heat stress, either through exercise or through passive heating, such as using a sauna or sitting in a hot bath.
The premise behind current guidelines – which advise pregnant women to avoid hot baths, saunas and exercising in hot weather – is that exceeding recommended core body temperature limits could risk the health of a woman;s unborn child.
It's now thought that risk is low, and less significant than previously understood.
In other words, you can take a high intensity exercise class on a hot day, indulge in a hot bath and even relax in a sauna without exceeding the recommended core temperature limit for pregnant women.
We'd love to hear what you think of this news – is heat stress risk during pregnancy something that concerned you? And if you're pregnant, would this research persuade you to have a hot soak in the bath, or does the new research feel like changing the goalposts? Leave us a comment here or come and join the conversation over on our Facebook page.