Erb’s palsy weakness or paralysis in the arm that is usually noticed after birth.

Vaginal Birth

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Erb’s palsy is caused by stretching of the baby’s neck during labor and delivery. This can result in damage to the upper nerves of the neck and shoulder. The nerve damage can then cause certain muscles in the baby’s arm to be weak.

Stretching may be caused by:

  • Long, difficult delivery
  • Delivery of a large baby
  • Shoulder dystocia
  • Breech delivery
  • Risk Factors

    Factors that may increase your chance of delivering a baby with Erb’s palsy include:

  • History of delivering larger babies
  • History of prolonged labor
  • Gestational diabetes
  • Symptoms

    Often, Erb’s palsy is discovered after birth due to the typical signs and symptoms, such as:

  • Inability of your baby to move an arm or shoulder
  • Arm is bent inward toward the body
  • Weak or absent reflexes in the arm
  • Loss of feeling in the arm
  • Diagnosis

    You may be asked about your baby's symptoms and medical history. A physical exam will be done. Other tests may include:

    Your baby may need imaging tests. This can be done with:

  • X-ray
  • MRI scan
  • Your baby may need to have muscle and nerve activity recorded. This can be done with:

  • Electromyography (EMG)
  • Nerve conduction study
  • Treatment

    Over time, the baby can recover movement. Feeling in the arm can also be recovered. In some cases, long-lasting damage can occur.

    Talk with the doctor about the best treatment plan, which may include:

  • Physical therapy—This can help keep your baby’s joints and muscles flexible and strong. You will take an active role in moving your baby’s shoulder, arm, and hand. Massage may also be an option.
  • Surgery—This may be recommended in cases where there is no improvement.
  • When your child is older, other treatments may be recommended, such as:

  • Muscle and tendon transfer surgery to improve function
  • Joint fusion surgery
  • Prevention

    To help reduce your baby’s chance of Erb’s palsy:

  • Have regular prenatal care visits.
  • Tell your doctor if you have had previous difficult deliveries.
  • Follow your doctor's instructions if you are diagnosed with gestational diabetes.