I had been avoiding the bath but decided to ask my OB about it. She said as long as the water was not 'too hot' they are 100% fine and even if it was hot she would not worry really. She said a good test is if you can get straight in not bit by bit, then you are totally fine wrt temp. She did reiterate not to have a spa or turn on any jets in the bath (mine is a spa bath) as this can cause probs in some rare cases.
Glad you enjoyed...