Early Signs of Cerebral Palsy: What Parents Should Watch For in the First 18 Months

If you are reading this, something is probably worrying you. Maybe your baby is not rolling over the way the books say she should. Maybe one fist is always clenched. Maybe a nurse mentioned the words "low Apgar" or "cooling" at the hospital and you never quite shook that feeling. Whatever brought you here, we want to give you straight, parent-friendly information about what early cerebral palsy can look like — and what to do next.

Cerebral palsy (CP) is the most common motor disability of childhood. According to the CDC, it affects roughly 1 in 345 children. But here is the part most families do not know: the formal diagnosis usually comes between 12 and 24 months, even though the signs often begin appearing in the first few months of life. That gap matters. The earlier intervention starts, the better the outcomes — not because therapy "cures" CP, but because the infant brain has remarkable plasticity, and early therapy can change the trajectory.

Why Cerebral Palsy Is So Often Caught Late

Newborns are floppy. They have unpredictable reflexes. They sleep, eat, and stare at ceiling fans. So the early features of CP — abnormal muscle tone, asymmetric movement, persistent primitive reflexes — can blend into the background of normal infancy. Pediatricians watch closely, but in busy 15-minute well-child visits, subtle motor patterns are easy to miss.

The other problem is that CP is a clinical diagnosis. There is no single blood test that confirms it. A pediatric neurologist combines the birth history, the neurologic exam, head imaging (usually MRI), and the trajectory of milestones over time. Many physicians intentionally wait to be certain — which is medically reasonable but can leave families months without answers.

A Month-by-Month Guide to the Red Flags

The list below is not a diagnostic tool. Babies develop at different paces, and individual variation is normal. But if you are seeing several of these in the right age range, that is a reason to ask your pediatrician for a referral to a developmental pediatrician or pediatric neurologist.

Newborn to 3 months

• Difficulty feeding — weak suck, choking, gagging, taking 45+ minutes to take a bottle.
• Excessive stiffness when picked up, or the opposite — feeling like a "rag doll" with very little head control past 8 weeks.
• One arm or leg that consistently moves differently than the other.
• A hand that stays clenched into a fist beyond about 2 months.
• Arching of the back or neck when held, beyond normal startle reactions.
• Crossing or "scissoring" of the legs when the baby is lifted upright.

4 to 6 months

• Not reaching for toys, or reaching with only one hand.
• Inability to bring hands together at the midline.
• Head still lags significantly when pulled to sitting.
• Persistent primitive reflexes (such as the asymmetric tonic neck reflex) that should be fading.
• Trouble rolling, or rolling only in one direction.
• Strong preference for one side of the body — "handedness" before 12 months is a red flag, not a milestone.

7 to 12 months

• Not sitting independently by 9 months.
• Crawling in an asymmetric pattern — for example, dragging one leg, or "commando" crawling using only the arms.
• Inability to bear weight on the legs when held standing.
• Toes that consistently point down ("toe pointing") when the baby is upright.
• Difficulty holding objects or transferring them from hand to hand.

13 to 18 months

• Not pulling to stand by 12 months or not walking by 18 months.
• Walking on tiptoes consistently rather than flat-footed.
• A noticeable limp or asymmetric gait once walking begins.
• Stiff, jerky, or uncoordinated movements.
• Significant delays in fine motor skills — not being able to bang two blocks together, point, or pick up small objects with a pincer grasp.

Delays That Resolve vs. Patterns That Do Not

Plenty of babies are late to roll, sit, or walk and turn out to be entirely typical. So how do you tell the difference between "she's just on her own schedule" and "something is wrong"?

The honest answer is that single late milestones rarely indicate CP. What is more concerning is a pattern: persistent abnormal muscle tone (either too stiff or too floppy), asymmetry between the two sides of the body, primitive reflexes that should be gone, and milestone delays that involve quality of movement, not just timing. A 14-month-old who walks with stiff, scissoring legs is sending a very different signal than a 14-month-old who walks late but with smooth, symmetric strides.

When the Birth History Itself Is a Red Flag

Some features of the labor, delivery, and newborn period dramatically raise the prior probability that subtle motor symptoms reflect CP. If any of the following apply to your child, take any motor concerns seriously and document them carefully:

• Fetal distress during labor — a non-reassuring fetal heart rate tracing, prolonged decelerations, or a so-called "Category III" pattern.
• Low Apgar scores, particularly an Apgar of 5 or lower at 5 minutes, or 7 or lower at 10 minutes.
• Need for resuscitation — chest compressions, intubation, bag-mask ventilation, or epinephrine in the delivery room.
• NICU admission for therapeutic hypothermia ("cooling"). Cooling is the treatment for hypoxic-ischemic encephalopathy — HIE — one of the most common pathways to CP. You can read more on our HIE and birth asphyxia page.
• Abnormal newborn head imaging — head ultrasound or MRI showing any sign of injury, bleed, or hypoxic changes.
• Seizures in the first days of life.
• Severe untreated newborn jaundice reaching levels that required exchange transfusion.

Children whose births involved any of these events deserve close developmental monitoring — not because every NICU baby will have CP, but because early intervention works best when it starts early. Our cerebral palsy page covers the medical mechanisms behind these scenarios in more depth.

How to Push for a Referral

Pediatricians are good at watchful waiting. Sometimes too good. If your gut is telling you something is wrong and the response is "let's just wait and see," here are reasonable next requests:

1. Request a referral to a pediatric neurologist or developmental pediatrician. You do not need permission — you can ask.
2. Ask for a referral to your state's Early Intervention program. In every state, families can self-refer. Early Intervention provides free assessments and, if your child qualifies, free physical therapy, occupational therapy, and speech therapy through age three.
3. Ask whether a brain MRI is appropriate. An MRI under general anesthesia is a real decision, but in the right clinical context it is the single most informative test for confirming or ruling out a structural brain injury.
4. Document specific concerns. Video clips of your baby's movements are more persuasive than your description of them. Take phone video and bring it to the appointment.
5. Get a second opinion. If your pediatrician dismisses concerns repeatedly and your gut still says something is wrong, you are allowed to see someone else.

Why Early Intervention Matters So Much

The first three years of life are an extraordinary window of brain development. Neural pathways are still forming. Movement patterns are still being learned and reinforced. When physical and occupational therapy begin in infancy, children with CP are more likely to walk independently, develop better hand function, and avoid the kinds of secondary musculoskeletal problems — contractures, hip dislocation, scoliosis — that follow untreated abnormal tone.

We have seen the difference firsthand in our clients. Two children with similar MRI findings can have profoundly different functional outcomes depending on when therapy began. That is why pushing for early evaluation is one of the most consequential things a parent can do.

If the Birth Involved Suspected Negligence

When a child is diagnosed with cerebral palsy and the birth history includes fetal distress, a delayed C-section, low Apgars, the need for cooling, or another preventable event, the family may have a legal claim against the providers and the hospital. A CP lawsuit is not about blame — it is about securing the lifetime resources your child will need.

Lifetime care for a child with severe CP can cost tens of millions of dollars. Insurance and public benefits cover only a fraction of that. A successful malpractice case funds the therapy, equipment, home modifications, and skilled attendant care your child will need for decades. At The Alvarez Law Firm, Herb Borroto, M.D., J.D., personally reviews the medical chart with a physician's eye, and Alex Alvarez prepares every case for trial.

We work on a contingency fee basis, which means there is no charge unless we recover money for you. The initial case review is free and confidential, with no obligation. If you are concerned that something went wrong during your baby's birth, we would rather you call and find out it was nothing than wait and miss a window that closes.