My Baby Crosses Their Legs When Standing
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician
Content reviewed against published AAP, NIH, CDC guidelines
Last reviewed:
Your baby's physical development is unique, and concerns about crosses their legs when standing, here is what you need to know.
The short answer
Leg scissoring or crossing when a baby is held in a standing position can be a sign of increased muscle tone (hypertonia) in the leg muscles. While occasional leg crossing is not always concerning, persistent scissoring should be evaluated by your pediatrician, as it can indicate spasticity or other neuromuscular conditions that benefit from early therapy.
Key takeaways
- Leg scissoring or crossing when a baby is held in a standing position can be a sign of increased muscle tone (hypertonia) in the leg muscles. While occasional leg crossing is not always concerning, persistent scissoring should be evaluated by your pediatrician, as it can indicate spasticity or other neuromuscular conditions that benefit from early therapy.
- Usually normal when: Your baby occasionally crosses legs but can easily be repositioned with legs apart.
- Call your doctor if: Your baby's leg scissoring is worsening or new neurological symptoms are appearing.
- Varies by age — see the age-by-age breakdown below
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What Parents Should Know
According to AAP, NIH, CDC guidelines, leg scissoring or crossing when a baby is held in a standing position can be a sign of increased muscle tone (hypertonia) in the leg muscles. While occasional leg crossing is not always concerning, persistent scissoring should be evaluated by your pediatrician, as it can indicate spasticity or other neuromuscular conditions that benefit from early therapy. At 0-3 months, some leg stiffness and crossing in newborns can be normal, especially in babies who were in a breech position. However, persistent scissoring when held upright should be mentioned to your pediatrician at the next visit. Your doctor can assess whether the tone is within normal range. It is generally considered normal when your baby occasionally crosses legs but can easily be repositioned with legs apart. However, you should contact your pediatrician promptly if your baby's leg scissoring is worsening or new neurological symptoms are appearing.
Normal vs. Concerning
By Age
What to expect by age
0-3 months
Some leg stiffness and crossing in newborns can be normal, especially in babies who were in a breech position. However, persistent scissoring when held upright should be mentioned to your pediatrician at the next visit. Your doctor can assess whether the tone is within normal range.
3-6 months
If your baby consistently crosses their legs when held in standing, this warrants evaluation. Normal babies at this age should be able to bear weight with legs apart. Scissoring can indicate tight adductor muscles or increased lower extremity tone that benefits from early intervention.
6-9 months
Persistent leg scissoring at this age is concerning and should be evaluated promptly. Your baby should be able to stand with support with legs apart by now. Your pediatrician may refer to a pediatric neurologist or physical therapist for further assessment.
9-12 months
If leg crossing persists, thorough evaluation is important. Early physical therapy and stretching can make a significant difference in outcomes for children with increased muscle tone. Do not wait to address this concern.
What to Tell Your Pediatrician
- Describe when you first noticed crosses their legs when standing and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby consistently crosses or scissors their legs when held in standing.
- Mention if your baby's legs feel stiff or resist being separated.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Your baby occasionally crosses legs but can easily be repositioned with legs apart.
- Your newborn was breech and has mild, resolving leg positioning.
- Leg crossing only happens briefly and your baby can bear weight with legs apart.
- Your baby consistently crosses or scissors their legs when held in standing.
- Your baby's legs feel stiff or resist being separated.
- Scissoring is present every time your baby is held upright.
- Your baby also has stiffness in other parts of their body.
- Your baby's leg scissoring is worsening or new neurological symptoms are appearing.
- Your baby has lost motor skills alongside the leg crossing.
What You Can Do at Home
- Keep track of when you notice crosses their legs when standing — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that your baby occasionally crosses legs but can easily be repositioned with legs apart — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Provide plenty of supervised floor time and tummy time to support your baby's physical development.
- While monitoring at home, seek immediate care if your baby's leg scissoring is worsening or new neurological symptoms are appearing.
Related Conditions
My Baby Seems Too Stiff (Hypertonia)
Hypertonia means your baby's muscles feel unusually tight or stiff, making it hard to bend or move their limbs. While some stiffness can be normal during certain movements (like when a baby is startled or upset), persistent stiffness at rest warrants evaluation. Early identification and physical therapy can make a significant difference.
Signs of Spasticity vs Normal Stiffness in Babies
Spasticity is velocity-dependent stiffness, meaning muscles resist fast movement more than slow movement. Normal baby stiffness occurs briefly during excitement or startle and resolves quickly. Spasticity is persistent, may affect one or more limbs, and often worsens with growth. Your pediatrician can perform specific tests to distinguish between normal tone variation and spasticity.
My Baby's Legs Are Stiff When Held Standing
While some babies stiffen their legs momentarily when excited about standing, persistently stiff legs that resist bending may indicate increased muscle tone (hypertonia). It is important to distinguish between a baby happily stiffening their legs to bear weight (normal) and legs that are rigid and difficult to bend (warrants evaluation).
Related Resources
Milestone Checklists by Age
Track your baby's developmental milestones from birth to 5 years with age-specific checklists.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
When to Call the Doctor
General guide on when to call the pediatrician, visit urgent care, or go to the ER.
Frequently asked questions
Is crosses their legs when standing normal?
When should I call the doctor about crosses their legs when standing?
When is crosses their legs when standing normal?
What causes crosses their legs when standing?
What should I mention to my pediatrician about crosses their legs when standing?
Is crosses their legs when standing normal at 0-3 months?
Is crosses their legs when standing normal at 3-6 months?
Should I go to the ER for crosses their legs when standing?
Does crosses their legs when standing go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss My Baby Crosses Their Legs When Standing.
Things to mention
- Describe when you first noticed crosses their legs when standing and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby consistently crosses or scissors their legs when held in standing.
- Mention if your baby's legs feel stiff or resist being separated.
- Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your baby consistently crosses or scissors their legs when held in standing.
- Your baby's legs feel stiff or resist being separated.
- Scissoring is present every time your baby is held upright.
Urgent signs to report immediately
- Your baby's leg scissoring is worsening or new neurological symptoms are appearing.
- Your baby has lost motor skills alongside the leg crossing.
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of crosses their legs when standing are normal. Talk to your pediatrician if your baby's leg scissoring is worsening or new neurological symptoms are appearing.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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Related Physical Concerns
My Baby Seems Too Stiff (Hypertonia)
Hypertonia means your baby's muscles feel unusually tight or stiff, making it hard to bend or move their limbs. While some stiffness can be normal during certain movements (like when a baby is startled or upset), persistent stiffness at rest warrants evaluation. Early identification and physical therapy can make a significant difference.
Signs of Spasticity vs Normal Stiffness in Babies
Spasticity is velocity-dependent stiffness, meaning muscles resist fast movement more than slow movement. Normal baby stiffness occurs briefly during excitement or startle and resolves quickly. Spasticity is persistent, may affect one or more limbs, and often worsens with growth. Your pediatrician can perform specific tests to distinguish between normal tone variation and spasticity.
My Baby's Legs Are Stiff When Held Standing
While some babies stiffen their legs momentarily when excited about standing, persistently stiff legs that resist bending may indicate increased muscle tone (hypertonia). It is important to distinguish between a baby happily stiffening their legs to bear weight (normal) and legs that are rigid and difficult to bend (warrants evaluation).
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