Women's racing (cyclocross and otherwise) usually does have fewer distinct categories than men's. Around here for road, we have cat 4's and after that everyone 3's - pro's usually have to race together. The only exception is at state championship races where you'll find master's races and separate scoring for 3's and master's A and B. For cyclocross (we just switched to the cat system this year) usually there are similar to a few more categories just because it doesn't matter if you have different groups out on the course at the same time. The one that I did had women's fields for 4's, masters, singlespeed, and 1/2/3's.