(WXYZ) - A new study finds babies who have trouble sleeping through the night may have inherited the gene from their parents.
The study was published Monday in the journal Pediatrics.
Researchers in Canada studied 500 sets of identical and fraternal twins and had their parents monitor their sleeping habits at 6, 18, 30 and 48 months of age.
They found genetics played a strong role in how long babies slept at night in all but three of the ages measured.
The one exception was 18 months of age. Researchers found environmental factors, such as having a TV on at night and where a baby slept, played a stronger role in how long a baby slept at night at the age of 18 months.
The study also found that environmental factors played more of a role in a baby's sleep during daytime naps and genetics played a stronger role in a baby's sleep at nighttime.
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