Washington: Genes largely determine whether children sleep through the night, a new study has shown. However, children`s ability to nap during the day is controlled more by their environment, researchers in Canada who studied sleep records from nearly 1,000 identical and fraternal twins in Quebec found.While some parents may find themselves fortunate in having a sound sleeper, the researchers said there are also ways to help a child along."The genetic influence is only part of the equation that controls sleep duration. One should not give up on trying correcting inadequate sleep duration or bad sleep habits early in childhood," the publication quoted study author Evelyne Touchette, a psychology researcher at Laval University in Quebec, as saying.The researchers found there is a particularly sensitive time for the influence of parental interventions, at around 18 months, Touchette said.
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