This is a tricky one. I know a lot of the womens stages in pro race tend to be a lot shorter than the mens. I don't think many of the stages last longer then a few hours, rather that the 6 or 7 hours the men might spend in the saddle, so maybe women either don't need to go or just hang on. I suppose if it's a wet rainy stage then they just let it go - as once you're wet you're wet.