Infant Sleep Safety (Infant Sleep in Context - Part 1)

Kathy Morelli
Feb 21, 2011
5 min read

Updated: Mar 2

You're a new parent. Your baby does not seem to have the same sleep needs as you do.

You were accustomed to a life that responded to effort. You worked hard. You stayed up late when needed. You nurtured a career, and when you took certain steps, the path expanded accordingly.

Then a baby arrives.

And suddenly the world no longer responds to planning and productivity. Your infant doesn't organize around your schedule. Sleep comes in fragments. Emotions feel amplified. You may find yourself exhausted, tender, irritable, grateful, and overwhelmed — sometimes within the same hour.

This transition is part of matrescence — the developmental shift in identity, relationship, and nervous system that accompanies becoming a mother.

You may wonder:

Why won’t the baby sleep?

Why are we bickering?

Why does this feel harder than I expected?

What you may need most is not another opinion, but support — someone to hold the baby while you shower, to bring a meal, to sit quietly with you in the long stretch of evening.

Yet advice often arrives faster than help. Well-meaning voices offer contradictory guidance. The noise can leave you doubting yourself at the very moment you're learning how to become a parent.

Research over the past two decades has clarified what many families already feel:

Persistent sleep deprivation increases vulnerability to depression and anxiety.
Insomnia during pregnancy predicts postpartum mood disorders.
Fragmented sleep impairs emotional regulation and stress tolerance.
Treating sleep disturbance often improves mood symptoms.

In the early months, infant sleep is neurologically immature. Frequent waking and dependence on caregiver proximity are developmentally normal — a concept we will explore more fully later in this series.

Night waking may be developmentally normal in infancy, but its cumulative impact on parents is significant.

In the US, Infant Sleep is an Industry

In the United States, infant sleep has become an industry. Books, consultants, online forums, and strong opinions surround a topic that, in many traditional cultures, unfolds within a slower family rhythm.

The modern context hasn't eased this burden:

Parents are still exhausted.
Social media has amplified comparison.
Sleep consultants are increasingly commercialized.
Postpartum mood disorders are more openly discussed.
Evidence linking sleep disruption and depression is stronger than ever.

The pressure has not gone away.

Night waking is developmentally normal in infancy. However, persistent parental sleep deprivation is one of the strongest contributors to postpartum mood and anxiety disorders. Decisions about infant sleep are therefore not only practical — they are deeply connected to family mental health.

For this reason, decisions about infant sleep deserve thoughtful consideration grounded in both safety and family values.

Infant sleep is not a matter of preference alone. It unfolds within a developmental and relational context, and safety must always come first.

Over the next several articles, I review commonly discussed infant sleep approaches so you can make informed decisions that align with your parenting style.

We begin with safety.

Safety and Infant Sleep

Sudden Infant Death Syndrome (SIDS)

The good news is that rates of Sudden Infant Death Syndrome (SIDS) have declined significantly over the past several decades, particularly since the recommendation that infants be placed on their backs to sleep.

SIDS most commonly occurs between two and four months of age, with the majority of cases occurring before six months.

The American Academy of Pediatrics (AAP) identifies the following risk factors:

Smoking exposure
Prone (stomach) sleep position
Soft bedding
Overheating
Illicit drug or alcohol use by caregivers
Prematurity
Poor prenatal care
Sleeping on couches or recliners with a caregiver
Bed-sharing under unsafe conditions

Infant sleep safety includes:

Place baby on their back to sleep
Use a firm sleep surface with a tightly fitted sheet
Avoid soft bedding, pillows, and loose blankets
Do not overheat the baby
Do not smoke near the baby
Room-share (keep the infant’s sleep space in the parents’ room for at least the first six months)

The AAP recommends room-sharing without bed-sharing for the first six months of life.

Exclusive breastfeeding has been associated with a reduced risk of SIDS, and some research suggests pacifier use may also be protective.

Bed-Sharing and Co-Sleeping

The topic of bed-sharing is often emotionally and culturally charged.

It is important to distinguish terms.

“Co-sleeping” broadly refers to a baby sleeping near a caregiver. “Bed-sharing” specifically refers to an infant sleeping in the same bed as a parent.

The AAP advises against bed-sharing on a population-wide level due to increased risk under certain conditions.

The Academy of Breastfeeding Medicine (ABMP) and researchers such as James McKenna, PhD, have emphasized that risk varies significantly depending on circumstances. Unsafe conditions include:

Sleeping on a couch or recliner
Soft bedding or loose blankets
Parental smoking
Alcohol or sedative use
Bed-sharing with multiple adults or other children
Bottle-feeding in bed

The ABMP defines bed-sharing as a safe practice between a breastfeeding mother-infant dyad, as distinct from co-sleeping which is a risky behavior.

Some researchers argue that in carefully controlled conditions — particularly within a breastfeeding mother-infant dyad — proximity may support physiological regulation and feeding.

Because bed-sharing is a complex behavior influenced by culture, feeding method, and family context, it is not a one-size-fits-all decision. Families benefit from understanding both the potential risks and the conditions that increase safety.

Crib and Bassinet Safety

Crib safety is equally important.

The Consumer Product Safety Commission (CPSC) recommends:

Use a bassinet for infants under six months when appropriate
Avoid drop-side cribs
Ensure the crib is less than ten years old
Check recall lists regularly
Ensure slats are no more than 2 1/8 inches apart
Ensure there are no gaps larger than two fingers between the mattress and crib frame

Hardware should be checked periodically, as loosening can occur over time.

Conclusion

Infant sleep safety can feel complicated in modern life. Parents are often navigating cultural expectations, extended family opinions, and conflicting professional advice — all while profoundly sleep deprived.

In the next article, we will explore one of the commonly discussed sleep approaches so you can continue forming a plan that feels informed and aligned for your family.

Related in the Infant Sleep Series:

Related Areas of Support:

References

American Academy of Pediatrics Task Force on Sudden Infant Death Syndrome. (2022). Sleep-related infant deaths: Updated 2022 recommendations for reducing infant deaths in the sleep environment. Pediatrics, 150(1), e2022057990.

Academy of Breastfeeding Medicine. (2022). ABM clinical protocol #6: Guideline on co-sleeping and breastfeeding. Breastfeeding Medicine, 17(9), 701–709.

Bei, B., Milgrom, J., Ericksen, J., & Trinder, J. (2015). Subjective perception of sleep, but not its objective quality, is associated with postpartum mood disturbances in healthy women. Sleep, 38(4), 659–668.

Okun, M. L. (2015). Disturbed sleep and postpartum depression. Current Psychiatry Reports, 17(6), 1–9.

McKenna, J. J., & Gettler, L. T. (2016). There is no such thing as infant sleep, there is no such thing as breastfeeding, there is only breastsleeping. Acta Paediatrica, 105(1), 17–21.

U.S. Consumer Product Safety Commission. (Current). Crib safety standards and recall information. U.S. Consumer Product Safety Commission.