Intraventricular hemorrhage (IVH), grades I to IV

How does this happen?

Until about 34 weeks of pregnancy, there is a structure in the brain called the germinal matrix. It is where new brain cells are made, and it is packed with fragile, thin-walled blood vessels. After about 34 weeks it disappears. ²

A baby born before that has this fragile tissue sitting right next to the ventricles. Two things then make it bleed.

Pressure swings. A premature baby's brain cannot regulate its own blood flow well. When blood pressure rises or falls, the change passes straight through to those fragile vessels. Anything that causes a swing can matter: a difficult resuscitation, a rapid fluid infusion, a pneumothorax, or long stretches of unstable blood pressure. ²

Venous congestion. Blood draining out of the area can back up, and the pressure bursts the thin vessels.

Once bleeding starts, where it goes decides the grade. It can stay in the germinal matrix, spill into the ventricle, fill and stretch the ventricle, or extend into the surrounding brain tissue.

Grade IV is worth a clear explanation, because the name misleads people. It is not simply a bigger version of grade III. It is a separate event: a blockage of the veins draining the white matter causes that tissue to become injured and bleed. This is why it is properly called periventricular hemorrhagic infarction. It affects one side more than the other, which is why grade IV so often leads to one-sided weakness rather than to symmetric problems. ²

What causes it?

Two different questions get mixed together here. The first is what leads to this injury in the body. The second is whether anyone could have prevented it. They are not the same question, and the answer to the first does not settle the second.

Happens even with perfect care

• Being born very early. This is the dominant risk factor and it is not preventable in many cases. ⁴
• A very fast or very difficult delivery, including precipitous preterm birth.
• Needing significant resuscitation at birth. ⁵
• Respiratory distress and the pressure swings that come with breathing support. ²
• Infection or inflammation before birth. ⁶
• Clotting differences, which are occasionally found.

Associated with gaps in care

These are situations where published standards say what the care team should watch for and do. A gap here does not prove anyone caused your child's injury. It points to where the medical records will have an answer.

• Antenatal corticosteroids not given when preterm birth was expected. Steroids reduce the risk of IVH. ^{3 7}
• Birth at a hospital without the right level of newborn care, or a mother not transferred before delivery when there was time. Levels of neonatal care are formally defined, and the safest transfer of a very preterm baby is usually before birth, not after. ⁸
• Resuscitation that did not follow the newborn algorithm. ⁵
• Blood pressure swings not recognized or not managed, or rapid fluid or bicarbonate infusions.
• Head ultrasounds not done on schedule, so a developing bleed or growing ventricles were not tracked.
• Growing ventricles not acted on, letting pressure build before intervention. ⁹

None of this decides an individual case. It is where the records will have answers.

What are the signs, by age?

Signs change as a child grows. A newborn cannot show you a walking problem. Some children look fine at first and show differences months later.

At birth and the first hours

Usually nothing. Most IVH is silent and is found on a routine scan, which is exactly why the scans are done on a schedule.

The first week

• Most often no visible signs at all.
• A larger bleed may show as a sudden drop in blood pressure or blood count, apnea, seizures, a bulging soft spot, or a baby who becomes limp and unresponsive.
• Head circumference measured daily is one of the simplest and most useful early warnings, because a fast-growing head suggests fluid is building up.

Around 3 months

• A head that is growing faster than expected on the chart, which can be the first sign of hydrocephalus. ⁹
• Irritability, vomiting, or a bulging soft spot.
• Differences in tone.

Around 6 months

• Delay in rolling, judged at corrected age. ¹⁰
• Asymmetry after grade IV, which affects one side more than the other.
• Continued rapid head growth.

Around 12 months

• Not sitting at 12 months corrected age. ¹⁰
• Clear one-sided weakness after grade IV.
• Stiffness in the legs where white matter injury is also present.

Toddler years

• Walking late or with an uneven gait.
• Speech delay.
• Seizures in some children.
• Shunt problems, if a shunt was placed. Every family with a shunt should know the warning signs of blockage.

School age

• Learning and attention differences are common, including after lower-grade bleeds.
• cerebral palsy where injury extended into brain tissue.
• Ongoing shunt monitoring for life, where one is in place.

How is it diagnosed?

IVH is found on cranial ultrasound, done at the bedside through the soft spot. Very preterm babies are scanned on a schedule, typically in the first week and then repeated, because most bleeds happen in the first three days and because ventricles can enlarge afterward. ²

Ask for the actual reports and the dates. A single grade without the follow-up scans tells you less than half the story.

Grade I

Bleeding is confined to the germinal matrix and does not enter the ventricle. ¹

Most babies with grade I do well, and it is often found on a routine scan in a baby who seemed entirely well. Follow-up scans are still done to confirm it has not extended. Developmental follow-up is still worth attending, because very preterm birth carries its own risks regardless of the bleed.

Grade II

Blood enters the ventricle but does not stretch it. ¹

Outlook is generally good and broadly similar to grade I. The main things to watch are the follow-up scans, head circumference, and development at corrected age.

Grade III

Blood fills the ventricle and stretches it. ¹

This is where the risk of hydrocephalus becomes substantial, because blood can block the normal flow and absorption of spinal fluid. Head circumference is measured often and scans are repeated. Some babies need repeated spinal taps, a temporary reservoir, or a shunt. ⁹

Developmental outcomes vary widely and are more often affected than at grades I and II.

Grade IV

Bleeding extends into the brain tissue around the ventricle. As explained above, this is a venous infarction rather than simply a larger bleed. ²

It is usually one-sided or clearly worse on one side, so the typical outcome is weakness on the opposite side of the body, often with cerebral palsy. Hydrocephalus is common. Seizures are more common than at lower grades.

Grade IV varies enormously in size, and a small unilateral infarction and a large one lead to very different lives. Ask how large it is and which side, not only what grade it is.

After the grade: what to track

• Head circumference, plotted on a chart, at every visit.
• Repeat scans to watch ventricle size.
• Term-equivalent MRI, which shows white matter injury far better than ultrasound. ²
• Developmental follow-up at set ages. ¹¹

What is the treatment?

There is no treatment that undoes a bleed. Treatment addresses what follows.

Supportive care in the NICU. Keeping blood pressure, oxygen and carbon dioxide steady. Avoiding rapid infusions. Treating anemia and clotting problems.

Managing fluid build-up. If ventricles enlarge, options run from watching with frequent measurement, to removing fluid by spinal tap or through a temporary reservoir under the scalp, to placing a shunt if the problem is permanent. Shunt placement is often delayed until the baby is bigger. ⁹

Seizure treatment where seizures occur, guided by EEG. ¹²

Early therapy. Referral to early intervention as soon as your child is identified as high risk, not after a diagnosis is confirmed. ^{13 14}

Shunt vigilance, for life. If a shunt is placed, learn the signs of blockage: headache, vomiting, unusual sleepiness, irritability, a change in personality, in a baby a bulging soft spot or rapid head growth. A blocked shunt is an emergency and it can happen years later. ⁹

What is the long-term outlook?

The grade matters, and it is not the whole story.

• Grades I and II. Most children do well. Outcomes are driven more by how early the baby was born than by the bleed itself. Developmental follow-up still matters. ²
• Grade III. Higher risk of hydrocephalus and of developmental differences. Outcomes vary widely, and whether ventricles enlarge and how that is managed is a large part of the picture. ⁹
• Grade IV. Usually one-sided weakness, often with cerebral palsy, often with hydrocephalus. Size and location matter enormously. Intelligence is frequently in the typical range. ²

Two things families should hear. First, the grade is not a sentence, and children at every grade land across a wide range. Second, the term-equivalent MRI and the way your child develops over the first two years predict more than the grade recorded in week one.

What does daily life look like?

In the NICU: daily head measurements, repeated scans, and a lot of waiting.

After discharge: follow-up clinic, therapy, and for families with a shunt, a permanent low-level alertness that never entirely goes away. Keep the neurosurgery contact number where you can find it at 3 a.m., and keep a record of the shunt type and the date it was placed.

At school: attention, processing speed and learning differences are the most common needs, often more than physical ones, and they are the ones most often missed because everyone is focused on the walking.

What does care cost over a lifetime?

No agency publishes a lifetime cost estimate for IVH. Where IVH leads to cerebral palsy, the CDC figure of about $921,000 in 2003 dollars is the published anchor. ¹⁵

Where a shunt is in place, the cost driver families report is not the original surgery but the revisions over a lifetime, each with a hospital stay. No public source publishes a reliable lifetime revision count, so this site does not give one.

See the cost of care estimator.

What can you do this week?

1. Ask for the grade, the side, and the date of every scan. Ask for copies of the reports.
2. Ask whether the ventricles are enlarging and what the plan is if they do.
3. Ask for daily head circumference measurements and ask to see them plotted.
4. Ask whether a term-equivalent MRI is planned.
5. Ask whether antenatal steroids were given before the birth.
6. Refer to early intervention now.
7. If a shunt is placed, write down the type, the date, the surgeon, and the warning signs and put it in your phone.

What should you ask each specialist?

Take these with you. Write the answers down in the moment, because you will not remember them later.

For the neonatologist

• What grade, which side, and on what day was it found?
• Has it changed on repeat scans?
• Are the ventricles enlarging? What number are you watching?
• Is a term-equivalent MRI planned?
• Were antenatal steroids given before delivery?

For the neurosurgeon

• At what point would you place a shunt, and what happens if we wait?
• What kind of shunt, and what should we watch for at home?
• What are the signs of a blockage, and who do we call at 2 a.m.?
• How often will this need checking as my child grows?

For the neurologist or follow-up clinic

• What are you watching for at each visit?
• What would make you think about cerebral palsy?
• Is there a seizure risk, and what would a seizure look like?

You can also build a printable list with the question generator.