Erb’s Palsy and Brachial Plexus Injury Claims

Erb’s palsy is the most common form of brachial plexus birth injury — damage to the bundle of nerves around a newborn’s shoulder that can leave an arm weak or immobile. Many of these injuries heal on their own within months. Some do not, and when a preventable delivery-room error caused the damage, families may have a legal claim.

Legal disclaimer: This article is for general information only. It is not legal advice and does not create an attorney-client relationship. It also does not provide medical advice — if your newborn is not moving an arm, contact your pediatrician promptly, as MedlinePlus advises. For legal questions, consult a licensed attorney in your state.

What the brachial plexus is

The brachial plexus is “a group of nerves around the shoulder,” carrying signals between the spinal cord and the shoulder, arm, and hand. When these nerves are stretched, compressed, or torn during birth, the result is called neonatal brachial plexus palsy (NBPP) — “a loss of movement or weakness of the arm,” in MedlinePlus’s description.

Think of the plexus as a cable bundle: mild stretching may bruise the cables (with function returning as the bruise heals), while severe stretching can tear them — and in the worst case, pull the nerve roots away from the spinal cord entirely (avulsion). The severity of the stretch largely determines both the symptoms and the recovery outlook.

Types: Erb’s palsy, Klumpke’s, and total palsy

MedlinePlus describes different forms of NBPP depending on which nerves are affected:

• Erb’s palsy (Erb-Duchenne paralysis) — the most common form, affecting the upper arm. The infant typically holds the affected arm extended at the elbow and against the body, with the classic “waiter’s tip” posture. It results from injury to the upper nerves of the plexus.
• Klumpke’s paralysis — affects the lower arm and hand, with decreased grip. MedlinePlus notes this form “is less common.”
• Total (pan-plexus) palsy — the entire arm is affected, from shoulder to hand. This is the most severe form and the least likely to resolve without intervention.

Symptoms are usually visible right away or soon after birth: no movement in the upper or lower arm or hand, an absent Moro (startle) reflex on the affected side, and the arm lying limp or held in an unusual position. MedlinePlus cautions that NBPP can be confused with pseudoparalysis — when a fractured collarbone makes the infant avoid moving the arm because of pain, without any nerve damage. A physical exam and sometimes an X-ray sort out the difference.

How the injury happens during delivery

MedlinePlus explains that the nerves “can be affected by compression inside the mother’s womb or during a difficult delivery,” with injury caused by:

• The infant’s head and neck pulling toward the side as the shoulders pass through the birth canal
• The shoulders stretching or the arm being pulled during a head-first delivery
• Pressure on the baby’s raised arms during a breech delivery

The classic scenario is shoulder dystocia: the baby’s head delivers, but a shoulder becomes stuck behind the mother’s pubic bone. The provider must then use accepted maneuvers to free the shoulder — and the margin between appropriate maneuvering and excessive force is where negligence questions arise. NOLO describes the same mechanism: “the brachial plexus is a bundle of nerves in the shoulder area” that “can be injured in labor and delivery,” including during shoulder dystocia. Our dedicated article on shoulder dystocia injuries covers the emergency itself in detail.

Risk factors providers should watch for

MedlinePlus lists the factors that increase NBPP risk:

• Breech delivery
• Maternal obesity
• A larger-than-average newborn (such as an infant of a diabetic mother)
• Shoulder dystocia — difficulty delivering the shoulder after the head has emerged

The standard of care requires providers to recognize these risk factors before delivery and plan accordingly — for example, by estimating fetal weight, considering the mother’s diabetes status, and having a plan (including possible C-section) for a potentially difficult delivery. MedlinePlus also notes that NBPP “is less common than in the past” because C-sections are used more often when a difficult delivery is anticipated — though a C-section “reduces the risk of injury” without eliminating it, and carries its own risks.

When risk factors were clearly present and the delivery plan ignored them, attorneys look closely. When no risk factors existed and the injury occurred despite appropriate care, a claim is much harder to support.

Recovery outlook

Families’ first question is usually about recovery, not lawsuits — and the medical news is often encouraging. MedlinePlus reports:

• Most babies fully recover within 3 to 4 months. Mild cases are managed with gentle massage and range-of-motion exercises, often with a pediatric physical therapist.
• Specialist referral is recommended if the damage is severe or the condition does not improve in the first few weeks.
• Surgery may be considered if strength does not improve by 3 to 9 months of age — procedures can involve nerve grafts or nerve transfers, though MedlinePlus notes “it is not clear whether surgery to fix the nerve problem can help” and healing “may take many years.”
• Babies who do not recover in the early months have a poor outlook for full recovery, particularly where imaging suggests avulsion (nerve root separation from the spinal cord).
• Possible lasting complications include permanent contractures (abnormal muscle tightening) and partial or total lasting loss of arm function.

This timeline matters legally too: the severity and permanence of the injury are central to the damages a claim seeks. A fully resolved mild palsy and a permanent total palsy are very different cases, even when the delivery events look similar. Our compensation guide explains how damages are evaluated.

When a brachial plexus injury may support a claim

Not every brachial plexus injury involves negligence — MedlinePlus notes that the nerves can be affected by compression inside the womb, and that prevention is difficult even with good care. A claim requires evidence that substandard care caused the injury. Scenarios attorneys investigate include:

• Excessive traction during shoulder dystocia. Accepted maneuvers exist for resolving shoulder dystocia; pulling forcefully on the head and neck is not among them. When the record shows excessive lateral traction, that is a classic breach allegation.
• Ignored risk factors. A large baby of a diabetic mother, a prior shoulder dystocia, or other clear warnings — with no documented delivery planning and no consideration of C-section.
• Improper use of forceps or vacuum. Excessive force or too many attempts with instruments can contribute to plexus injury.
• Fundal pressure or other discouraged techniques applied during the emergency.

Proving these scenarios requires the same four elements as any birth injury claim — standard of care, breach, injury, causation — established through expert testimony. LawInfo notes that “causation can be difficult to prove in birth injury cases” and that claims “depend on expert witness testimony.” Our article on proving medical negligence walks through how that proof works.

One caution: the defense in these cases often argues the injury was caused by the natural forces of labor itself (maternal pushing forces), not by the provider’s actions. This “maternal forces” defense is well known in brachial plexus litigation, and overcoming it requires strong expert testimony about the delivery mechanics.

Frequently asked questions

Will my baby’s Erb’s palsy heal on its own?

Often, yes — MedlinePlus reports most babies fully recover within 3 to 4 months with conservative care like physical therapy. But some do not, and only your child’s doctors can assess the individual prognosis. Follow their guidance and get specialist referrals when recommended.

How do doctors tell Erb’s palsy from a broken collarbone?

Through physical examination and sometimes X-ray. In pseudoparalysis from a clavicle fracture, the baby avoids moving the arm because of pain but has no nerve damage — and begins using the arm as the fracture heals, which in infants happens quickly.

Is shoulder dystocia always the provider’s fault?

No. Shoulder dystocia is often unpredictable — it frequently occurs with no warning. The negligence question is not whether dystocia happened, but whether the provider’s response met the standard of care.

What if the injury happened during a C-section?

MedlinePlus notes that while C-sections reduce NBPP risk, they do not prevent it. Injury during a C-section is uncommon but possible, and the same negligence analysis applies: did the care meet the standard?

How long do we have to look into a claim?

Deadlines vary by state — commonly one to two years from the injury, with some states extending the window for minors. Because waiting can be fatal to a claim, families should seek a legal opinion early, even while treatment is ongoing.

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Injury Claim Guide is an informational resource, not a law firm, and this article does not provide legal advice or medical advice. No attorney-client relationship is created by reading it. Whether a brachial plexus injury supports a legal claim depends on medical evidence and state law, including filing deadlines that vary by state. For medical concerns about your child, see your pediatrician; for legal questions, consult a licensed birth injury attorney in your state.