Delayed Walking In Infants: Causes And Symptoms
Updated: Jun 30
Quick Summary
Most babies take their first steps between 9 and 12 months and walk independently by 15 months. Late walking up to 18 months is often within normal range, though some children may have underlying causes such as low muscle tone, prematurity, or neurological factors. Knowing when to seek evaluation, what to watch for, and how early intervention can help empowers parents to act with confidence.
Every parent has a moment where they start comparing. At a playgroup, another baby the same age is already toddling around confidently, and your child is still crawling or cruising along the furniture. Is that a problem? Should you be worried? Is this delayed walking in babies, or just a child doing things in their own time?
These are among the most common questions families bring to pediatric therapists. The answer requires understanding the actual range of typical development, what can cause late walking, and when early support can make a meaningful difference.
At Innovative Interventions, our physical therapists work with infants and toddlers throughout New Jersey to support gross motor development, including children who are walking later than expected.
What Is Considered Delayed Walking in Babies?
Walking is one of the most anticipated developmental milestones, but it is also one of the most variable. While many babies take their first independent steps between 9 and 12 months, others may not begin walking until closer to 15 months and still be developing typically. In general, pediatricians consider walking by 18 months to be within the expected developmental range.
A baby may be considered to have delayed walking if they are not walking independently by 18 months or if they are significantly behind in earlier gross motor milestones, such as sitting, crawling, pulling to stand, or cruising along furniture. Delayed walking does not automatically mean there is a serious medical condition. Some children simply develop at their own pace, while others may benefit from an evaluation to identify underlying factors and determine whether early intervention or physical therapy could help them build the strength, balance, and coordination needed to walk confidently.
Normal Walking Milestones in Babies (Step-by-Step)
Walking does not happen suddenly. It is the result of months of motor development building on itself. Here is what the typical progression looks like:
By 6 months: Most babies can sit with support and are developing the core strength that walking will eventually require
By 8–9 months: Pulling to stand using furniture, beginning to cruise (walking sideways while holding onto objects)
By 9–12 months: Taking first independent steps, often unsteady and with a wide stance
By 12–15 months: Most children are walking independently, even if still falling often
By 18 months: Walking is considered within the typical range up to this point; anything beyond may warrant evaluation
According to the American Academy of Pediatrics (AAP), not walking by 18 months is generally considered a developmental delay and warrants a professional evaluation.
Common Causes of Delayed Walking in Babies
1. Genetic or Familial Factors
Late walking can run in families. If a parent or sibling walked significantly later than average and there was no underlying condition, a child walking late for the same reason is sometimes called a “familial walker.” This is a benign pattern, but it should be a diagnosis of exclusion, meaning other causes should be ruled out before attributing late walking to family history alone.
2. Prematurity
Babies born prematurely often reach motor milestones later than their birth-date peers. Developmental professionals use a concept called “corrected age,” which adjusts milestone expectations based on when the baby would have been born at full term. A baby born two months early at 14 months old is developmentally more like a 12-month-old, so walking expectations should be adjusted accordingly.
3. Low Muscle Tone (Hypotonia)
Hypotonia is a reduction in muscle tone that affects how muscles feel and how much control a child has over their movements. Babies with low tone may feel floppy when held, have difficulty holding positions, and reach motor milestones later. Hypotonia has many possible underlying causes, ranging from benign to significant, and warrants medical evaluation.
Our physical therapy team frequently works with children with low muscle tone to build the strength and motor control needed for walking and other gross motor skills.
4. Neurological Conditions
Conditions affecting the brain or nervous system, including cerebral palsy, brain injury, and spina bifida, can affect motor development and cause delayed walking. In these cases, the walking delay is typically accompanied by other motor signs, such as asymmetry in movement, stiffness, or significant coordination difficulties.
5. Muscular Disorders
Rare but important, muscular dystrophies and other myopathies can affect muscle strength and function. These conditions are typically identified through a combination of clinical assessment, genetic testing, and sometimes muscle biopsy.
6. Vitamin or Nutritional Deficiencies
Severe deficiency in vitamin D or calcium can affect bone health and muscle function, potentially contributing to motor delays. While nutritional causes of delayed walking are uncommon in children with access to adequate nutrition, they are worth considering, particularly in cases with other signs of deficiency.
7. Environmental & Lifestyle Factors
Babies who spend extensive time in bouncers, car seats, or other positioning equipment that limits floor time and weight-bearing experience may develop motor skills more slowly due to reduced opportunity. This is entirely correctable with changes in daily routines. The recommendation for extensive tummy time from early infancy is grounded in research showing its positive effect on gross motor development.
8. Personality & Temperament
Some children who are cautious, content, or simply not motivated to be upright and mobile may walk later than more physically adventurous peers. This is particularly common in children who are highly efficient crawlers and see no urgent reason to walk. While temperament can be a factor, it is important not to use this explanation without ruling out physical causes.
Signs That May Accompany Delayed Walking
Walking delays do not occur in isolation. Pay attention to any of the following signs that might accompany late walking:
One side of the body appears stronger, stiffer, or more coordinated than the other
The child avoids putting weight through their feet or shows significant discomfort when standing
Toes are always pointing inward or outward significantly
The child shows regression in motor skills they had previously achieved
Walking delay is accompanied by delays in other developmental areas such as speech, cognition, or fine motor skills
When Should You Be Concerned About Delayed Walking?
Use 18 months as the primary benchmark. If a child is not walking independently by 18 months, a conversation with your pediatrician is warranted. However, do not wait until 18 months if you observe any of the red flags above, particularly asymmetry, regression, or multiple developmental delays occurring together.
Earlier evaluation is always better. New Jersey families with children under three can access early intervention services through the state’s program, which provides free or low-cost evaluations and therapy in the home environment.
How Doctors Diagnose Walking Delays
Evaluating delayed walking typically begins with a pediatrician visit, during which the doctor will take a thorough developmental history, observe the child’s movement, and assess muscle tone and reflexes. Depending on findings, the pediatrician may refer to a pediatric neurologist, orthopedist, or developmental pediatrician, or directly to a physical therapist for an evaluation.
Blood tests, genetic testing, or imaging such as MRI may be recommended if a neurological or genetic cause is suspected. A physical therapy evaluation will assess gross motor skills, strength, balance, coordination, and quality of movement in detail.
Treatment and Support for Delayed Walking
Treatment depends entirely on the underlying cause. For many children, physical therapy is the primary intervention. PT for delayed walking focuses on building the specific strength, balance, and coordination needed for independent walking, delivered through therapeutic play and activities that are motivating and appropriate for the child’s developmental level.
When walking delays are related to conditions such as cerebral palsy or hypotonia, physical therapy may be combined with medical management or other therapies. Our team at Innovative Interventions collaborates across disciplines to ensure children receive coordinated, comprehensive care.
How Parents Can Help Encourage Walking at Home
Maximize floor time from an early age, particularly tummy time in infancy
Offer low, stable furniture for cruising practice
Encourage standing during play, such as at a low table or activity center
Limit time in restrictive equipment like bouncers and walkers, which can delay motor development
Make walking fun by standing slightly out of reach and encouraging your child to come to you
Shoes with thin, flexible soles allow feet to feel the ground and support balance better than rigid footwear
Can Late Walking Still Be Normal?
Yes. A significant number of children who walk between 15 and 18 months are perfectly healthy and have no underlying condition. Walking at 16 or 17 months with no other concerns is within the range of typical variation. The challenge for parents is knowing when variation becomes delay and when to seek input.
If you are unsure, getting an evaluation does not commit you to a long course of treatment. It simply gives you information. And if there is something worth addressing, earlier is always better than later.
Key Takeaways
Most babies walk between 9 and 15 months; not walking by 18 months is generally considered a delay
Causes range from familial patterns and temperament to low muscle tone, prematurity, and neurological conditions
Red flags include asymmetry, regression, stiffness, or delayed milestones across multiple areas
Physical therapy is an effective intervention for many causes of delayed walking
New Jersey families can access early intervention services for children under three at no cost through the state program
If you have concerns about your child’s walking development, contact Innovative Interventions to request a physical therapy evaluation in your home.
Frequently Asked Questions
Is it normal for a baby not to walk at 14 months?
Yes. Walking up to 18 months is typically within the normal range. That said, if you have other concerns about your child’s development, an evaluation is always appropriate at any age.
What is the most common reason for delayed walking in babies?
Low muscle tone and limited floor/weight-bearing time are among the most common factors. Prematurity is also a significant contributor when corrected age is not taken into account.
Should I use a baby walker to help my child learn to walk?
No. Traditional wheeled baby walkers are not recommended by the American Academy of Pediatrics. They can delay motor development and present safety hazards. Push toys and furniture cruising are safer and more effective alternatives.
Can physical therapy really help a baby who is not walking yet?
Yes. Physical therapy specifically targets the building blocks of walking, including strength, balance, and motor coordination, and is highly effective for many children with delayed walking.
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