How to Stop Startle Reflex Without Swaddling

Last Updated on August 28, 2023

The startle reflex or Moro reflex is a primitive reflex that babies exhibit shortly after birth, typically disappearing when they are 4 to 6 months old. This reflex can cause your baby to jerk or twitch, often waking them from sleep suddenly. While swaddling is a common method to control this reflex and soothe infants, it’s not the only solution. Some parents might prefer other strategies or find their baby doesn’t respond well to swaddling.

This blog post will investigate various ways to control the startle reflex without swaddling. We’ll explore methods like reducing external triggers, holding your baby close, and creating a calm and soothing environment. We will also delve into techniques such as skin-to-skin contact, gentle rocking, white noise, and massage, which can help soothe your baby and minimize the startle reflex.

Whether you’re a new parent navigating these early reflexes or an experienced caregiver looking for alternative methods, this blog will provide practical tips and insights to help your baby sleep more peacefully. So, let’s dive in and explore how to stop the startle reflex without swaddling.

How to Stop Startle Reflex Without Swaddling

What is the Moro Reflex?

The Moro reflex, or the startle reflex, is one of newborn babies’ many involuntary reflexes. It’s named after Ernst Moro, the Austrian pediatrician who first described it in 1918.

This reflex is typically seen when a baby is startled by a loud sound or sudden movement or feels like they’re falling. The response is usually a two-part reaction: firstly, the baby will throw their head back, extend out their arms and legs, cry, and then pull their arms and legs back in.

Dr. William Sears, a renowned pediatrician and author on baby and childcare describes the Moro reflex as “a primitive reflex that safeguards against the universal childhood fear of being dropped.” He further explains a baby’s position changes abruptly, or when he falls asleep, and his head tilts forward, the Moro reflex causes him to fling out his arms and spread his fingers, as if grasping for support.”

What Causes Babies to Experience the Moro Reflex

The Moro reflex, or the startle reflex, is a normal, involuntary response in newborn babies. It’s often triggered when a baby feels startled or as if they’re falling, causing them to have a surprised look and move their arms suddenly 1. This reflex can be set off by various stimuli such as loud noises, sudden movements, intense light, or the sensation of falling.

This reflex is an integral part of a baby’s neurological development and is a sign that their nervous system is functioning properly. It’s one of the several reflexes babies are born with and is typically noticed soon after birth.

While it’s a natural part of infancy, the Moro reflex can sometimes disrupt a baby’s sleep. For instance, when you lean over to lay your soundly sleeping baby down, the sudden change in position might trigger this reflex, startling them awake.

Understanding what triggers the Moro reflex is key to finding ways to manage it without swaddling. By creating a calm and soothing environment, reducing abrupt movements, and gradually adapting your baby to different sensations, you can help minimize the occurrences of this reflex and ensure your little one gets a good night’s sleep.

How To Stop Startle Reflex Without Swaddling

Based on the information gathered from various sources, there are several ways to stop the startle reflex, also known as the Moro reflex, without swaddling.

Reduce outside triggers 

Keeping the environment calm and soothing can help reduce the startle reflex. Try to maintain dim or even lighting intensity to avoid startling your baby.

Close Contact

Holding your baby close to your body as you lower them can provide security and reduce the startle reflex.

Soothing techniques 

Skin-to-skin contact, gentle rocking, white noise, and massage effectively calm your baby and prevent the startle reflex.

Side and stomach lying 

Some sources suggest placing your baby on their side or stomach (supervised) can help turn off the startle reflex.

Remember, the startle reflex is a natural response in babies and typically disappears after 3 or 4 months. 

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How do you know if your baby has Moro reflex?

How to Stop Startle Reflex Without Swaddling

The Moro reflex, or the startle reflex, is a normal part of a baby’s development. It can be observed in healthy babies from birth until they are about 3 or 4 months old. Here are some signs that your baby has the Moro reflex:

Startling: The most noticeable sign of the Moro reflex is that your baby will startle in response to certain stimuli. This could be a loud noise, a sudden movement, or a change in their head position.

Spreading out arms: When startled, your baby will spread out their arms and hands, often with fingers splayed.

Pulling arms in: After spreading their arms, your baby will quickly pull them back in. They may also cry at the same time.

Crying: Babies often cry after exhibiting the Moro reflex. This is a normal response typically caused by the surprise of being startled.

It’s important to remember that the Moro reflex is a normal part of your baby’s development and is not usually a cause for concern. However, if your baby doesn’t exhibit the Moro reflex or seems to be present beyond 4-6 months, it’s a good idea to consult your child’s healthcare provider.

How does creating a calm environment help stop the startle reflex?

Creating a calm environment can significantly help in reducing the startle reflex. The startle reflex, or Moro reflex, is an automatic response to sudden changes in stimuli, such as loud noises or swift movements. 

By maintaining a tranquil and predictable environment, you can minimize these sudden changes, thereby reducing the chances of triggering the reflex. This is particularly important for infants, who have a strong startle reflex and can be easily disturbed by abrupt changes. 

A calm environment can promote better sleep, reduce stress, and improve overall well-being, which further helps control the startle reflex.

Does my newborn need to be swaddled?

Swaddling, the practice of wrapping newborns snugly in a blanket, has been a traditional method parents use to soothe and calm their little ones for centuries. However, whether or not to swaddle a newborn is a decision that depends on the individual baby’s needs and the safety measures followed.

Dr. Harvey Karp, a renowned pediatrician, and child development expert, advocates for swaddling, stating that it can be incredibly soothing for babies. He says, “Swaddling recreates the snug packaging inside the womb and is the cornerstone of calming. It decreases startling and increases sleep.”

On the other hand, certain risks are associated with swaddling if not done properly. According to Dr. Rachel Moon, Chair of the Task Force on SIDS at the American Academy of Pediatrics, “If babies are swaddled, they should be placed only on their back and monitored so they don’t accidentally roll over.”


Can the startle reflex be stopped without swaddling?

Yes, soothing and comforting techniques like skin-to-skin contact, gentle rocking, white noise, and massage can help calm your baby and reduce the startle reflex without swaddling.

How does skin-to-skin contact help with the startle reflex?

Skin-to-skin contact can provide comfort and security for your baby, helping to alleviate the anxiety that might trigger the startle reflex.

Can white noise help reduce the startle reflex?

Yes, white noise mimics the sounds in the womb, providing a familiar and soothing background noise that can help calm your baby.

Is it normal for my baby to have a startle reflex?

Yes, the startle reflex is a normal part of a baby’s neurological development and is usually present from birth up to around 5 or 6 months.


In conclusion, stopping the startle reflex without swaddling involves creating a calm and soothing environment, using white noise to mask sudden sounds, and incorporating gentle movements like rocking or swinging. 

Regular feeding and ensuring the baby is not overtired can also help in reducing the intensity of the reflex. While it may not be possible to completely stop the startle reflex as it’s an innate response, these steps can significantly mitigate its impact, promoting better sleep and comfort for your baby.

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Dr. Leah Alexander

Dr. Leah Alexander is a board-certified general pediatrician who has been in practice for over 20 years. She began working as a pediatrician at Elizabeth Pediatric Group of New Jersey in 2000. Since 2005, she has been working as an independently contracted pediatrician with Medical Doctors Associates at Pediatricare Associates of New Jersey. Read more

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