My Baby Isn't Bearing Weight on Their Legs
The short answer
Most babies begin to enjoy bearing weight on their legs when you hold them in a standing position by around 4 to 6 months. By 9 months, babies should be able to support their weight on their legs with you providing balance support. If your baby's legs consistently buckle or they show no interest in pushing down, it's worth discussing with your pediatrician.
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By Age
What to expect by age
0-3 months
Newborns have a stepping reflex where they'll make walking motions if held upright, but this disappears around 2 months. After that, it's completely normal for babies to not support their weight yet. Their leg muscles and the neural pathways controlling them are still maturing. Don't worry if your young baby's legs seem "floppy" at this stage.
4-6 months
Many babies start to enjoy "standing" on your lap around this time, pushing down with their legs and bouncing. If your baby isn't doing this yet, it doesn't necessarily indicate a problem - some babies simply aren't interested in this position yet and are focused on other skills like reaching and rolling. But if they seem unable to push down at all, mention it to your doctor.
7-9 months
By this age, most babies enjoy bearing weight on their legs and may bounce enthusiastically when held standing. If your baby's legs still buckle every time or they pull their legs up and refuse to put them down, your pediatrician should take a look. They'll check muscle tone, hip joints, and reflexes to make sure everything is developing properly.
10-12 months
Babies should be bearing weight well on their legs by now and many are pulling to stand. If your baby still can't support their weight on their legs, this warrants evaluation. A pediatric physical therapist can assess strength, tone, and coordination and create a plan to help your baby build the skills they need for standing and eventually walking.
What Should You Do?
When to take action
- Your baby is under 5 months and doesn't push down when held standing - leg strength is still developing.
- Your baby bears weight briefly but then lifts their legs - they may just prefer other positions right now.
- Your baby bears weight when motivated (like bouncing to music) but not when you try to "make" them stand - they're choosy, not delayed.
- Your baby was premature - adjusted age matters significantly for weight-bearing milestones.
- Your baby is over 6 months and consistently can't push down or bear any weight on their legs when held in a standing position.
- Your baby's legs seem unusually stiff OR unusually floppy when you hold them upright.
- Your baby bears weight but only on one leg, keeping the other lifted or turned in.
- Your baby is over 9 months and shows no interest in standing activities at all.
- Your baby was bearing weight on their legs and has stopped - loss of this ability needs immediate evaluation.
- Your baby's legs cross or scissor when held standing, which can indicate increased muscle tone requiring assessment.
- Your baby has no weight-bearing ability combined with generally low muscle tone, feeding difficulties, or other developmental concerns.
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
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Related Physical Concerns
My Baby Seems to Use One Side More Than the Other
Babies should use both sides of their body fairly equally during the first 18 months of life. While slight preferences can be normal, a consistent pattern of favoring one side - using one arm much more than the other, crawling with one leg dragging, or turning the head predominantly one way - should always be discussed with your pediatrician. Early identification of asymmetry leads to the best outcomes.
My Baby Only Army Crawls
Army crawling (also called commando crawling) is a completely valid and normal way for babies to move. Many babies army crawl for weeks or even months before transitioning to hands-and-knees crawling, and some skip hands-and-knees crawling entirely. What matters is that your baby is independently mobile and exploring their environment.
One Side of My Baby's Body Moves Differently
Babies should generally use both sides of their body equally. If one side consistently moves differently, is weaker, stiffer, or less coordinated, this warrants evaluation. Asymmetric movement can indicate hemiplegia (cerebral palsy affecting one side), brachial plexus injury, or other neurological conditions that benefit from early therapy.
My Baby Crawls Unevenly
While some variation in crawling patterns is normal, consistently favoring one side or dragging one limb while crawling warrants attention. Babies should use both arms and both legs relatively equally when crawling. Persistent asymmetry could indicate muscle tone differences, hip issues, or neurological concerns that benefit from early evaluation.
My Baby Still Has the Fencing Reflex (Persistent ATNR)
The asymmetric tonic neck reflex (ATNR, also called the fencing reflex) causes your baby to extend the arm on the side they are looking toward. It should integrate between 4-6 months. If the ATNR persists strongly beyond 6 months, it can interfere with bringing hands to midline, bilateral hand use, and rolling. Evaluation is recommended.
Signs of Ataxia in Babies and Toddlers
Ataxia refers to wobbly, uncoordinated movements that result from problems with the cerebellum (the brain's coordination center). Signs include an unsteady, wide-based gait, difficulty with precise hand movements, and intention tremor (shaking that worsens when reaching for something). If you notice these signs, evaluation by a pediatric neurologist is important.