Some people are not aware of this but you cannot have very hot baths during pregnancy so if you also suspect you may be pregnant do ensure you stop. A hot bath is considered to be higher than 102.2 Degrees Fahrenheit for more than 10 mins. For those in UK that is 39/40 Degrees Celsius. Having hot baths can increase chance of miscarriage as well as birth defects. It can also make you sick or faint due to lowering your blood pressure which can affect blood flow to baby. This means no Sauna, jacuzzi and steam rooms and similar things either. So please be careful x