It looks like the diaper days may be over for women who like to dive dry. There's a dutch company (Wethorse Productions) now selling a device called the "She-P" designed to connect the female anatomy to a drysuit p-valve, and those who have tested it report being very satisfied with the results!
The manufacturer's web site can be found
here. Reviews and discussion are ongoing at thedecostop.com, and registered members can follow the link to it
here.