The Five “S’s” – A Science-Backed Approach to Soothing Infants
Caring for a newborn can be both rewarding and exhausting, especially when it comes to managing crying and ensuring restful sleep. Fortunately, research suggests that Dr. Harvey Karp’s Five “S’s”—swaddling, side/stomach positioning, shushing, swinging, and sucking—are effective non-pharmacological techniques for soothing infants, reducing crying, and improving sleep.
The Science Behind the Five “S’s”
Newborns experience rapid changes in their sleep-wake cycles as they develop circadian rhythms, with substantial stabilization occurring by 4 to 6 months. All infants cry, with a natural peak between 6 to 8 weeks of age before gradually improving by 3 to 4 months. However, excessive crying and frequent night wakings can be distressing for both infants and parents, contributing to parental stress, maternal depression, and family discord.
Research Findings on the Five “S’s”
A review of studies on infant soothing techniques found that the Five “S’s” effectively calmed infants, reduced crying duration, and improved sleep patterns. Specifically:
- Pain Reduction: Studies found that using the Five “S’s” during routine vaccinations decreased pain scores and crying time in infants.
- Better Sleep: Infants who experienced these soothing techniques had fewer night wakings and improved self-regulation behaviors within the first 12 weeks of life.
- Reduced Infant Obesity: When combined with simple dietary advice, the Five “S’s” were associated with a decrease in excess weight at 1 year, with benefits lasting up to 3 years.
- Preterm Infant Benefits: Exposure to womb-like sounds, a component of the Five “S’s,” helped reduce intermittent hypoxemia and bradycardic events in preterm infants.
The 5 S’s of Soothing: What Are They and Why Do They Work?
1. Swaddle: The Comfort of a Secure Embrace
Swaddling is like wrapping your baby in a warm, cozy hug. It recreates the snug environment of the womb, making babies feel safe and secure. Research shows that swaddling can significantly reduce crying and promote better sleep—which is a win for both babies and exhausted parents!
Try This:
- Use a lightweight, breathable blanket.
- Wrap snugly but leave room for hip movement (to prevent hip dysplasia).
- Always place your baby on their back for sleep.
If your baby startles easily or struggles to settle, swaddling can be a game-changer. Some parents find that a swaddle combined with other S’s works even better!
2. Side/Stomach Position: The Magic of a Gentle Hold
While placing babies on their stomachs for sleep is not safe (due to SIDS risk), holding them in a side or stomach position while soothing can work wonders. This position triggers a natural calming reflex and helps reduce fussiness.
Try This:
- Hold your baby against your chest in a tummy-down “football hold.”
- Lay them across your forearm with their tummy resting on your arm.
- Gently cradle them on their side in your arms.
Always switch your baby to their back for sleep, but using this position while soothing can be incredibly effective.
3. Shush: The Soothing Sound of White Noise
Believe it or not, babies love noise! In the womb, they were surrounded by constant whooshing sounds—your heartbeat, blood flow, and muffled voices. That’s why silence can actually be unsettling for newborns.
A “shh-shh-shh” sound mimics these comforting womb noises, helping to soothe a fussy baby.
Try This:
- Softly whisper “shhh” near your baby’s ear.
- Use a white noise machine or app (fans, vacuum sounds, and heartbeat rhythms work great!).
- Play gentle lullabies or womb-like recordings.
Studies show that white noise can improve sleep and reduce crying, making it a must-have for many parents!
4. Swing: The Calming Rhythm of Motion
Babies are used to constant motion. In the womb, they were rocked with every step you took! That’s why gentle movement—whether it’s swaying, rocking, or bouncing—can be so effective for calming them.
Try This:
- Rock your baby in your arms or a glider.
- Use a baby swing (make sure it meets safety guidelines).
- Try a gentle bounce on an exercise ball.
This rhythmic motion triggers a natural calming response and can help lull your baby to sleep. Just remember, avoid rapid or jerky movements—gentle and steady is key.
5. Suck: The Natural Comfort of Sucking
Babies have an innate need to suck—it’s soothing and helps regulate their emotions. Whether it’s breastfeeding, bottle-feeding, or using a pacifier, sucking can provide almost instant relief.
Try This:
- If breastfeeding, offer comfort nursing when your baby is fussy.
- Try a pacifier (if your baby likes them—some do, some don’t).
- Let your baby suck on their hand or fingers if they prefer.
Research shows that sucking helps babies relax, reduces pain, and improves sleep. It’s one of the simplest and most effective calming techniques!
Contributing Factors to Infant Crying and Disturbed Sleep
Infant crying and disrupted sleep can result from various factors, including:
- Infant Factors: Age, temperament, neurobiological development, hunger, excessive tiredness, or medical issues such as reflux and allergies.
- Parental Factors: Postnatal depression, stress, anxiety, and a lack of social support can heighten perceptions of infant distress.
- Environmental Factors: Excessive noise, overstimulation, smoking environments, or inconsistent sleep settings may contribute to poor sleep and increased crying.
The Broader Impact on Families
Excessive crying and frequent night wakings can be overwhelming for parents, leading to exhaustion, increased risk of maternal depression, and even family discord. Studies suggest that improving infant sleep can enhance parental well-being, reducing stress and sleep deprivation, which in turn promotes a healthier family dynamic. Additionally, research highlights that effective soothing techniques may help decrease the risk of more serious concerns, such as sudden infant death syndrome (SIDS) and child abuse associated with caregiver frustration.
This post may contain affiliate links. When you buy through links or my site, I may receive a commission at no additional cost to you. Also, the information on this site is NOT intended to be medical advice. Please seek professional medical care if needed. See disclosures for more information.
Why the Five “S’s” Matter for Parents
For up to 20% of parents, concerns about their baby’s excessive crying and irritability persist during the first three months of life. The Five “S’s” provide a practical, research-backed method for addressing these concerns without relying on medications, which often have limited efficacy and potential side effects.
Final Thoughts
Understanding and implementing the Five “S’s” can make a significant difference in both infant and parental well-being. These simple yet effective techniques help babies sleep better, cry less, and thrive in their early months of life—providing relief not only for infants but also for the parents who care for them.
