I'd take a stroll around Amazon and just look for books about medieval women.

I don't know if they contain exactly this information, but other books to check out would be the medieval volume of Duby and Arries' "History of Private Live" series (the whole series is really interesting), and Reay Tannahill's "Sex In History". I may be off about the authors' last names by a little, but the book titles are correct.