Does the amount of sleep differ between men and women?

Does the amount of sleep differ between men and women?

Chris Idzikowski (Director of the Edinburgh Sleep Centre) gives expert video advice on: Why do we need sleep?; How much sleep is recomended each night?; Does the amount of sleep differ between men and women? and more...

Sometimes it's said that women may sleep less than men, but really the large statistical surveys tend to point to roughly equivalent or perhaps even more with women. I think it's really just highly variable, so I don't know what the sex differences are. When one gets sleep disorders, like insomnia, there tends to be a difference between men and women.