What is periventricular leukomalacia, in simple terms?

Periventricular leukomalacia, usually shortened to PVL, is damage to the brain's white matter, the tissue that acts like wiring, carrying signals between different brain areas. This wiring sits right next to fluid-filled spaces called ventricles, and in very premature babies it's especially vulnerable because the cells responsible for building it are still immature. One review found white matter damage in about 40% of babies born before 28 weeks, compared with around 7% of babies born just before full term, showing how strongly this risk is tied to how early a baby arrives.

What brain scans are actually done for premature babies, and when?

Common practice for babies born at 32 weeks or earlier is at least two cranial ultrasound scans: one in the first week or two of life, and another around 36 weeks of corrected age or close to going home from the neonatal unit. These scans catch bleeding or white matter changes that often show no outward symptoms at all, which is why they're done routinely rather than only when a problem is suspected.

What type of cerebral palsy is most linked to premature birth?

Spastic diplegia, where the legs are affected more than the arms, is the pattern most classically linked to white matter damage from prematurity. This is because the nerve fibres controlling leg movement pass directly through the area of white matter that sits closest to the ventricles, exactly the region most vulnerable in very premature babies. Not every child follows this classic pattern, but it's the one doctors watch for most closely in children born very early.

Premature Birth and Cerebral Palsy: Why Preterm Babies Are at Higher Risk

Causes & Prevention 12 min read

Premature Birth and Cerebral Palsy: Why Preterm Babies Are at Higher Risk

Q: Why does being born early raise the risk of cerebral palsy?

A baby's brain does a huge amount of building work in the final months of pregnancy. Blood vessels are still forming, and the cells that will insulate nerve fibres are still maturing. Being born before this work is finished leaves certain brain areas more fragile and more exposed to injury, especially from bleeding or reduced blood flow. The earlier a baby is born, the less of this building work has been completed, which is why risk rises sharply with earlier gestational age.

Q: What is intraventricular hemorrhage?

Intraventricular hemorrhage, or IVH, is bleeding into the fluid-filled spaces inside the brain. It's graded from mild (grade 1) to severe (grade 4), with more severe bleeding carrying meaningfully higher risk of later difficulties, including cerebral palsy. IVH often causes no obvious outward signs, which is exactly why routine brain ultrasound scans, not just waiting to see symptoms, are standard practice for premature babies in intensive care.

Q: What actually helps protect a premature baby's brain?

Two treatments given to the mother before delivery have real, measured evidence behind them. Magnesium sulfate, given when preterm labour is expected before 32 weeks, has been shown in multiple trials to lower the risk of cerebral palsy by roughly a third, and is now recommended by the World Health Organization for this reason. Corticosteroid injections, usually given before 34 weeks when early delivery is expected, reduce the risk of bleeding in the brain, though researchers are still refining understanding of the ideal dose. Delayed clamping of the umbilical cord at birth is another step increasingly used for its protective effect.

If your baby was born early, you’ve probably already heard the words “brain scan” and “cerebral palsy” more than you expected to this soon. This article explains, in plain language, why prematurity raises the risk, what doctors are actually checking for, and what real steps genuinely help protect a baby’s brain.

Written by CP Clinic Medical Team Tovmed Medical Center, Vinnytsia, Ukraine

Medically reviewed by Prof. Vigein Tovmasian PhD · Orthopedic Surgeon · Honorary Doctor of Ukraine

Why early birth raises the risk

In the final months of pregnancy, a baby’s brain is doing an enormous amount of building work. Blood vessels are still forming. The cells that will later insulate nerve fibres, almost like wrapping wires in protective tape, are still maturing.

Being born before this work is finished leaves certain parts of the brain more fragile. They’re more exposed to injury, especially from bleeding or a drop in blood flow. This is the simplest way to understand why risk rises so sharply the earlier a baby arrives: less building work has had time to finish.

PVL: damage to the brain’s “wiring”

Periventricular leukomalacia, usually just called PVL, means damage to the brain’s white matter. Think of white matter as the wiring that carries signals between different parts of the brain.

This wiring sits right next to fluid-filled spaces called ventricles. In very premature babies, it’s especially fragile, because the specific cells responsible for building it are still immature at this stage.

How often white matter damage shows up, by how early a baby was born

Born before 28 weeks

~40%

Born before 32 weeks

~27%

Born before 37 weeks

~7%

These numbers show the pattern clearly: the earlier a baby is born, the more common this kind of brain injury becomes.

When PVL is severe, it’s strongly linked to cerebral palsy. In fact, one review of the evidence found that most children with the more serious, cyst-forming type of PVL went on to develop CP.

IVH: bleeding inside the brain

Intraventricular hemorrhage, or IVH, means bleeding into those same fluid-filled spaces inside the brain. Doctors grade it from 1 (mild) to 4 (severe). The more severe the bleeding, the higher the chance of later difficulties, including cerebral palsy.

Here’s an important detail: IVH very often causes no obvious outward signs at all. A baby can have real bleeding happening inside the brain while looking completely settled on the outside. This is exactly why doctors don’t wait for symptoms. They scan for it directly, as a matter of routine.

The brain scans doctors actually do

First scan

Within the first week or two of life

An early cranial ultrasound, a painless scan using sound waves, checks for bleeding or early signs of white matter injury.

Second scan

Around 36 weeks of corrected age, or near discharge

A follow-up scan checks how things have developed since the first one, and is standard practice for babies born at 32 weeks or earlier.

If your baby was born at 32 weeks or earlier, it’s entirely reasonable to ask directly whether these two scans have been done, and what the results showed.

What genuinely helps protect the brain

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Magnesium sulfate, given to the mother before 32 weeks When early labour is expected, this treatment has been shown across multiple studies to lower the risk of cerebral palsy by roughly a third. It’s now recommended by the World Health Organization specifically for this reason.
💉
Corticosteroid injections, usually given before 34 weeks Given to the mother when early delivery is expected, these reduce the risk of bleeding in the baby’s brain. Researchers are still working out the ideal dose, so this remains an active area of study, but the overall protective effect is well established.
⏱️
Delayed clamping of the umbilical cord Waiting a short time before clamping the cord at birth is increasingly used because of its protective effect on a premature baby’s brain and overall health.

None of these are things a family arranges on their own. They’re decisions made by the obstetric and neonatal team, but knowing they exist means you can ask directly whether they’ve been considered for your specific situation.

The specific pattern of CP linked to prematurity

Spastic diplegia, where the legs are affected more than the arms, is the pattern most classically linked to prematurity-related brain injury. The reason is almost mechanical: the nerve fibres controlling leg movement pass directly through the exact area of white matter that sits closest to the ventricles, precisely the region most vulnerable in very premature babies.

Not every child follows this classic pattern exactly, but it’s the one clinicians watch for most closely in children born very early.

If spasticity develops and becomes significant

The same evidence-based path used for any child with spastic cerebral palsy applies here: physiotherapy first, with surgical treatment considered if spasticity becomes significant enough that physiotherapy alone can no longer keep up.

Minimally invasive procedures such as SFDM (Selective Fibrotomy of Damaged Muscles), offered at CP Clinic from age 2 onward, are designed specifically for this type of spasticity, the pattern most often seen following prematurity-related brain injury.

Early, consistent developmental support, started well before any formal CP diagnosis is confirmed, gives a child the strongest possible starting point. Many NICU graduates begin physiotherapy based on risk alone, long before anyone can say for certain whether CP will be diagnosed.

Want to talk through your baby’s specific situation, scan results, or what to watch for next?

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Frequently asked questions

Why does being born early raise the risk of cerebral palsy?

A baby’s brain does huge amounts of building work in the final months of pregnancy: blood vessels forming, cells maturing that will later insulate nerve fibres. Being born before this finishes leaves certain brain areas more fragile and exposed to injury, especially from bleeding or reduced blood flow. The earlier the birth, the less building work is complete.

What is periventricular leukomalacia, simply put?

Damage to the brain’s white matter, the tissue that acts like wiring between brain areas. It sits next to fluid-filled spaces called ventricles and is especially vulnerable in very premature babies. About 40% of babies born before 28 weeks show white matter damage, compared with about 7% born just before full term.

What is intraventricular hemorrhage?

Bleeding into the fluid-filled spaces inside the brain, graded from mild (1) to severe (4). More severe bleeding carries higher risk of later difficulties including CP. It often causes no outward signs, which is why routine ultrasound scans, not just watching for symptoms, are standard for premature babies.

What brain scans are done, and when?

Babies born at 32 weeks or earlier typically get at least two cranial ultrasounds: one in the first week or two of life, another around 36 weeks corrected age or near discharge. These catch bleeding or white matter changes that often show no outward symptoms.

What actually helps protect a premature baby’s brain?

Magnesium sulfate given to the mother before 32 weeks lowers CP risk by roughly a third and is WHO-recommended. Corticosteroid injections before 34 weeks reduce brain bleeding risk, though ideal dosing is still being studied. Delayed cord clamping is another protective step increasingly used.

What type of CP is most linked to prematurity?

Spastic diplegia, where the legs are affected more than the arms, since the nerve fibres controlling leg movement pass through the exact white matter region most vulnerable in very premature babies.

If my premature baby develops spastic CP, what are the treatment options?

The same evidence-based path as any spastic CP: physiotherapy first, with surgery considered if spasticity becomes significant enough. SFDM at CP Clinic, available from age 2, is designed specifically for this spasticity pattern. Early developmental support, started before formal diagnosis, gives the strongest starting point.

References

“Exploring the neurological impact of prematurity: Shared mechanisms in periventricular leukomalacia (PVL), intraventricular hemorrhage (IVH), and hydrocephalus.” ScienceDirect. ScienceDirect ↗
“Impact of peri-intraventricular haemorrhage and periventricular leukomalacia in the neurodevelopment of preterms: A systematic review and meta-analysis.” PMC. PMC ↗
“Fetal Neuroprotection by Magnesium Sulfate: From Translational Research to Clinical Application.” Frontiers in Neurology. Frontiers ↗
“Risk Factors for Periventricular Leukomalacia in Preterm Infants: A Systematic Review, Meta-analysis, and GRADE-Based Assessment of Certainty of Evidence.” ScienceDirect. ScienceDirect ↗
“Antenatal Corticosteroids and Risk of Cerebral Palsy: A Regression Discontinuity Study.” The Journal of Pediatrics. Journal of Pediatrics ↗
“Cerebral Palsy and the Relationship to Prematurity.” Springer Nature. Springer ↗

Medical disclaimer: This article is for informational purposes. Decisions about screening, prevention, and treatment should be made with your baby’s neonatal and paediatric care team based on direct clinical assessment.