Don’t worry if baby doesn’t sleep through the night

New research shows that parents shouldn’t worry if their infant doesn’t sleep through the night by 6 to 12 months of age.

New parents often expect their baby to start sleeping through the night by around six months of age. Indeed, they often receive messages from pediatricians and others about the importance of early sleep consolidation. But the authors of the new study, which appears in the journal Pediatrics, found that a large percentage of healthy babies don’t reach that milestone by six months of age, or even at a year old.

The research team also examined whether infants who didn’t sleep for six or eight consecutive hours were more likely to have problems with psychomotor and mental development and found no association. The researchers also found no correlation between infants waking up at night and their mothers’ postnatal mood.

Sleep numbers

The researchers analyzed information from the Maternal Adversity, Vulnerability, and Neurodevelopment longitudinal birth cohort study, which recruited participants from obstetric clinics in Montreal, Québec, and Hamilton, Ontario.

Researchers defined sleeping through the night as either six or eight hours of sleep without waking up. Sleep measures were available for 388 infants at six months old, and 369 infants at a year old.

At six months of age, according to mothers’ reports, 38 percent of typically developing infants were not yet sleeping at least six consecutive hours at night; more than half (57 percent) weren’t sleeping eight hours. At 12 months old, 28 percent of infants weren’t yet sleeping six hours straight at night, and 43 percent weren’t staying asleep for eight hours.

“…parents might benefit from more education about the normal development of—and wide variability in—infants’ sleep-wake cycles.”

Researchers saw a difference between sleep patterns of boys and girls. At six months old, a slightly higher percentage of girls than boys slept for eight hours straight (48 versus 39 percent).

Researchers also found no correlation between infants waking up at night and their mothers’ postnatal mood. But they did discover that babies who didn’t sleep for six or eight consecutive hours had a significantly higher rate of breastfeeding, which offers many benefits for babies and mothers.

A new ‘gold standard’?

Sleeping through the night somewhere between six to twelve months is generally considered the “gold standard” in Western nations. Indeed, behavioral sleep training is popular among parents and professionals to encourage children to sleep.

But lead researcher Marie-Hélène Pennestri from McGill University hopes that the results of the study will allay some parental worries.

“Our findings suggest parents might benefit from more education about the normal development of—and wide variability in—infants’ sleep-wake cycles instead of only focusing on methods and interventions, especially for those who feel stressed about methods such as delayed response to crying,” Pennestri says.

She continues, “Maternal sleep deprivation is often invoked to support the introduction of early behavioral interventions, but it may be that mothers’ expectations about being awakened at night along with the total number of hours they sleep over the course of a day are better predictors of maternal well-being. It is something that will need to be considered in future studies.”

Source: McGill University

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