Women, Menstruation and Yoga

I find it hard, as a man, to dictate what women should or should not be doing in class because of their menstrual period. Mary Pullig Schatz, medical doctor and author, has written an excellent article on the subject which can be found here:

http://www.yoga.com/ydc/enlighten/enlighten_document.asp?ID=74&section=9&cat=93