Shoulder Dystocia During Birth: Risks, Complications, and What Parents Should Know

Shoulder dystocia is one of the most frightening and time-sensitive complications that can occur during a vaginal delivery. It happens when the baby’s head is delivered, but one or both shoulders become stuck behind the mother’s pelvic bone. This creates a situation where the baby is literally caught in the birth canal, unable to breathe as the umbilical cord is often compressed against the mother’s pelvis. Because the baby’s chest cannot expand, and their oxygen supply is limited, the medical team must act within minutes to resolve the impaction. When handled correctly, specific maneuvers can safely dislodge the baby; however, when handled with panic or excessive force, the result is often a permanent and devastating injury to the child’s nerves or bones.

Table of Contents

• What is Shoulder Dystocia?
• The Critical Minutes: Why It Becomes Dangerous
• Identifying the Risk Factors Before Labor
• Complications: Brachial Plexus Injuries and Erb’s Palsy
• The Risk of Oxygen Deprivation and HIE
• Physical Trauma: Fractures and Internal Injuries
• Long-Term Developmental and Physical Issues
• Emergency Response: The Standard of Care
• Next Steps for Families

What is Shoulder Dystocia?

Shoulder dystocia is a specific type of obstructed labor that occurs during a vaginal delivery when the baby’s head is delivered, but the shoulders become stuck behind the mother’s pelvic bone. In a standard delivery, once the head emerges, the rest of the body follows easily with the next contraction. However, in cases of dystocia, the baby’s leading shoulder becomes wedged against the symphysis pubis, effectively trapping the infant in the birth canal.

This is a mechanical problem that cannot be resolved by simply pulling harder on the baby’s head. In fact, applying excessive force is the primary cause of permanent nerve damage in these scenarios. Doctors are trained to recognize the “turtle sign,” where the baby’s head emerges and then pulls back tightly against the mother’s body, as the first indication of this emergency.

The Critical Minutes: Why It Becomes Dangerous

When a baby’s shoulders are stuck, the situation becomes time-sensitive because the baby’s chest is compressed within the birth canal. This compression prevents the baby from breathing on their own and, more importantly, often compresses the umbilical cord against the mother’s pelvis. This restriction of blood flow means the baby is receiving a limited supply of oxygenated blood from the placenta.

Medical teams typically have a window of approximately five to seven minutes to resolve the impaction before the risk of permanent brain damage or death increases significantly. This creates an atmosphere of extreme pressure in the delivery room. The safety of the child depends entirely on the physician’s ability to remain calm and utilize specialized maneuvers rather than resorting to panic-driven force.

Identifying the Risk Factors Before Labor

While shoulder dystocia can occur in any delivery, there are several red flags that medical providers should monitor during prenatal care. The most common risk factor is fetal macrosomia, which is the medical term for a baby that is much larger than average, typically over 8 pounds, 13 ounces. When a baby is large, their shoulders are naturally broader, making them more likely to become caught on the pelvic bone.

Maternal conditions such as gestational diabetes also significantly increase the risk. Diabetes can cause the baby to grow disproportionately, with a larger torso and broader shoulders relative to their head size. Other factors include maternal obesity, a history of shoulder dystocia in previous births, and a pregnancy that has gone past the 40-week mark. If these risks are present, the standard of care may require the doctor to discuss the possibility of a scheduled C-section to avoid a traumatic vaginal delivery.

Complications: Brachial Plexus Injuries and Erb’s Palsy

The most frequent injury resulting from the mismanagement of shoulder dystocia is damage to the brachial plexus. The brachial plexus is a network of nerves near the neck and shoulder that controls the movement and sensation in the arm and hand. When a doctor panics and pulls on the baby’s head to try and free the stuck shoulder, they stretch these delicate nerves beyond their capacity.

This stretching can cause Erb’s palsy, a condition where the child’s arm may hang limp or be rotated inward in a “waiter’s tip” position. In some cases, the nerves are completely torn away from the spinal cord, leading to permanent paralysis of the limb. While some children recover with years of intensive physical therapy, many require complex nerve grafting surgeries and still face lifelong limitations in their range of motion and strength.

The Risk of Oxygen Deprivation and HIE

Beyond physical nerve damage, the primary concern during a prolonged shoulder dystocia is the lack of oxygen reaching the baby’s brain. If the umbilical cord is pinched or the baby’s chest cannot expand, the resulting hypoxia can lead to Hypoxic-Ischemic Encephalopathy (HIE). HIE is a type of brain dysfunction caused by a lack of oxygen and blood flow, which can result in cerebral palsy or other cognitive impairments.

The severity of the HIE is often determined by how long the baby was stuck and how quickly the medical team was able to initiate resuscitation after birth. If a baby is born blue, limp, or requires help breathing after a dystocia, they must be monitored closely for signs of neurological injury. Cooling therapy, or therapeutic hypothermia, is often used in the hours following birth to try and minimize the long-term effects of oxygen deprivation.

Physical Trauma: Fractures and Internal Injuries

The sheer physical force required to resolve a shoulder dystocia can sometimes lead to bone fractures in the newborn. The most common fracture is a broken clavicle (collarbone), which is sometimes done intentionally by the doctor to narrow the baby’s shoulders and allow them to pass. While a broken collarbone usually heals relatively quickly and without long-term consequences, it is a clear sign of the intensity of the delivery.

In more severe cases, the baby may suffer a fractured humerus (upper arm bone) or even internal organ damage from the pressure applied to the mother’s abdomen. If a medical team uses “fundal pressure”—pushing down on the top of the uterus—they are acting against medical guidelines and significantly increasing the risk of these physical traumas. These injuries, especially when combined with nerve damage, serve as evidence that the medical team may have used excessive and dangerous force.

Long-Term Developmental and Physical Issues

The effects of a traumatic delivery involving shoulder dystocia can linger long after the child leaves the hospital. Children with brachial plexus injuries may struggle with fine motor skills, affecting their ability to write, play sports, or perform daily tasks like buttoning a shirt. This physical disability can also lead to social and emotional challenges as the child grows and becomes aware of their limitations.

If oxygen deprivation occurred, the child may face developmental delays that do not become apparent until they reach school age. These can include learning disabilities, speech delays, and behavioral issues. Families often find themselves managing a lifetime of specialist appointments, including neurology, orthopedics, and occupational therapy. The financial and emotional cost of these long-term issues is why many families seek legal accountability to secure the resources their child will need for the future.

Emergency Response: The Standard of Care

To prevent these devastating outcomes, the medical community follows a strict set of maneuvers designed to free the baby safely. The most common first step is the McRoberts maneuver, which involves pulling the mother’s knees toward her chest to open the pelvis as wide as possible. This is often paired with suprapubic pressure, where a nurse pushes on the mother’s lower abdomen to nudge the baby’s shoulder into a better position.

If these external maneuvers fail, the doctor must perform internal rotations or attempt to deliver the baby’s posterior arm first. These techniques are designed to change the orientation of the baby without applying any traction to the head or neck. When a doctor follows these protocols, the majority of shoulder dystocias are resolved without injury. Malpractice occurs when a physician skips these steps and resorts to pulling, which is universally recognized as the most dangerous action they can take.

Next Steps for Families

If your child was born with a brachial plexus injury or signs of oxygen deprivation following a difficult delivery, it is important to understand what happened. You have the right to request a full copy of your medical records and to have them reviewed by an independent expert. Many birth injuries are not the result of “unavoidable complications” but are the direct result of medical staff failing to follow the standard of care.

Securing your child’s future means ensuring they have access to the best medical treatments and therapies available. Holding the responsible parties accountable not only helps your family but also sends a message that maternal and neonatal safety must be the priority in every delivery room. Your child deserves every opportunity to thrive, and seeking justice is the first step in providing them with the support they need.