One of the interesting things in my mother's house was the old medical handbook, either edited or written (I don't remember which) by Dr. Morris Fishbein for publication in 1942.

It was a useful all around guide to hygiene, sex, childhood diseases, fevers, first aid and care of the ill.

Patricia was quoting from it the other night. I paraphrase:

Many people think that bathing is harmful to pregnant women. This is a pernicious belief.