One page summary: Birth injury vs birth defect: the difference and why it matters

In two sentences

A birth injury is damage to a body that formed normally, caused by something that happened around the time of birth. A birth defect is a difference in how part of the body formed, which happens during pregnancy, usually in the first weeks. ¹

The distinction matters for three reasons: it changes what treatment is possible, it changes what the family is told about recurrence in a future pregnancy, and it is the difference between an event and a formation. Both can produce a child with cerebral palsy or developmental delay, and telling them apart takes specific testing rather than assumption. ²

The numbers, with their sources

• What a birth defect is. A structural change present at birth that affects how part of the body looks or works, arising during development in pregnancy ¹
• How common birth defects are. CDC reports that birth defects affect about 1 in 33 babies born in the United States each year ¹
• What a birth injury is. Damage occurring around the time of birth to structures that had formed normally, such as nerve, bone or brain injury from the physical or oxygen-related events of labor and delivery ³
• Why it is not always obvious. Both can produce the same outcome, such as cerebral palsy, and professional guidance is explicit that most cerebral palsy is not caused by events during labor ⁴
• What settles it. The pattern on brain imaging, genetic and metabolic testing, the placental pathology report, and the record of what happened during labor ³
• Why genetic testing matters. A growing share of cases that look like cerebral palsy are found to have a genetic cause on testing ²

What to do this week

1. Ask what the brain MRI showed, and request the radiology report itself.
2. Ask whether the placenta was sent to pathology, and request that report separately.
3. Ask what genetic and metabolic testing has been done, and what remains.
4. Request the complete labor and delivery records with the records request builder.
5. Ask for the cord blood gas results and the Apgar scores.
6. Refer to early intervention now, without waiting for the answer.
7. If your child has lost a skill they had, say so clearly. It changes the workup. ²

Questions to take with you

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

For the neurologist

• What did the MRI show, and does the pattern suggest an injury or a malformation?
• Does the imaging suggest when this happened?
• What genetic and metabolic testing has been done, and what would you add?
• Is there anything about this picture that does not fit?
• What would make you revisit the diagnosis?

For the geneticist

• What testing is appropriate here, and what would each test change?
• If we find a cause, does it change treatment or monitoring?
• What does this mean for a future pregnancy?

For the obstetric team

• Was the placenta sent to pathology, and can I have the report?
• What were the cord blood gases?
• What did the fetal monitoring show, and for how long?
• Was anything unusual noted during the pregnancy?

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

Where to read more

The full page on this condition covers how it happens, causes split into what happens even with perfect care and what is associated with gaps in care, signs by age, diagnosis, treatment, outlook, daily life and lifetime cost.

Read the full page on Birth injury vs birth defect: the difference and why it matters

Related pages are listed at the bottom of it, including the events that can lead to this condition and the guides that cover therapy, school and money.