Is it safe to use a sauna or hot tub in pregnancy?

Like what Idza said, it's a big nono to go to saunas and hot tubs as pregnant women will get dehydrated quickly. Also, because your baby is still developing in your stomach and the heat might cause a disruption. If you must, take a warm shower but for me personally, I was feeling so warm and especially in Singapore's weather, I was taking a lot of cold showers.