Ensure Safe Sleep, Physically and Emotionally

Babies and children have needs at night just as they do during the day; from hunger, loneliness, and fear, to feeling too hot or too cold. They rely on parents to soothe them and help them regulate their intense emotions. Sleep training techniques can have detrimental physiological and psychological effects. Safe co-sleeping has benefits to both babies and parents.

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Journal Studies

How Do Mothers Help Their Children Sleep at Night? Night-waking Strategy Use Among Mothers of Preschool-aged Children
Patterns of Developmental Change in Infants’ Nighttime Sleep Awakenings from 6 through 36 Months of Age
Weinraub, M., Bender, R. H., Friedman, S. L., Susman, E. J., Knoke, B., Bradley, R., ... & Williams, J. (2012). Patterns of Developmental Change in Infants’ Nighttime Sleep Awakenings from 6 through 36 Months of Age. Developmental Psychology, 48(6),1511-1528.

Infants with night-wakings were more likely to be boys, be breastfed, have a difficult temperament, come from a large family, have a depressed mother, be in a single-parent home, and/or attend fewer hours of non-parental child care; however, this tendency for more night-wakings tended to resolve by 18 months.
Infant Sleep and Paternal Involvement in Infant Caregiving During the First 6 Months of Life
Tikotzky, L., Sadeh, A., & Glickman-Gavrieli, T. (2011). Infant sleep and paternal involvement in infant caregiving during the first 6 months of life. Journal of Pediatric Psychology, 36(1), 36-46.

In solitary sleep arrangements, mothers were more involved in nighttime parenting than fathers, and breastfeeding was related to less father involvement. More father involvement early on predicted fewer night-wakings by 6 months.
Cross Cultural Differences in Toddler and Infant Sleep
Mindell, J. A., Sadeh, A., Wiegand, B., How, T. H., & Goh, D. Y. (2010). Cross-cultural differences in infant and toddler sleep. Sleep Medicine, 11(3), 274-280.

Child sleep problems are based more on culturally-influenced parental perceptions than actual biological reasons, and nighttime sleep issues tended to be perceived more problematic than daytime naps.
Normal Sleep Patterns in Infants and Children: A Systematic Review of Observational Studies
Galland, B. C., Taylor, B. J., Elder, D. E., & Herbison, P. (2012). Normal sleep patterns in infants and children: A systematic review of observational studies. Sleep Medicine Reviews, 16(3), 213-222.

More research is needed to identify normal sleep patterns in breastfed versus bottle-fed infants, in toddlers, on weekdays versus weekends, and as related to gender and ethnic differences. What is known is that children sleep longer at night and experience fewer night-wakings and daytime naps as they develop.