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has found that men may sleep
than women. Because of this, sleep
experienced by the sexes need different
. Insomnia is 1.5 times more
among women. Researchers say one reason for this is our body clock. Women's circadian
are about six minutes shorter than men's, so women have less time in which to rest. Another
is motherhood. There are unequal strains and
on mothers. A doctor said: "It's almost like their
was half-listening out for their children in the middle of the
."