I don't recall, Trap: didn't they have a separate tent for women to go to during their time of the month? And did they have to wash their rags, or burn them?
Can't recall now...
I do remember making a cool biblical connection when seeing the infertility specialist. As I recall, he was not "into the bible", but he did tell me why women shouldn't have intercourse during their period.
A lack of cleanliness and the potential for cervical prolapse were definitely two factors. (We are not producing cervical mucous at that time, and IT is what protects us the rest of the month!)