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Shoulder Dystocia: Signs, Causes, Prevention & Complications

July 30, 2025

Childbirth is a miraculous yet unpredictable process. Although the majority of vaginal deliveries go without complications, others can bring some unexpected issues, one of the most alarming of which is shoulder dystocia. Severe complication arises when, once the head of the baby has emerged, one or both shoulders get stuck behind the mother's pelvic bone, complicating the delivery of the baby safely.

Shoulder dystocia is an obstetric emergency as it necessitates prompt and skilled intervention to avoid both maternal and infant injury. Shoulder dystocia management, rapid action, and timely recognition are essential to ensuring a favourable outcome.

What is Shoulder Dystocia?

Shoulder dystocia happens when the shoulders of the baby do not come out after the head, usually as a result of one shoulder wedging behind the mother's pubic bone. The mechanical problem halts the progress of the labour and creates a high-pressure situation that requires expert medical handling.

It usually happens with vaginal delivery and is more prevalent in large babies (macrosomia) or prolonged labour. Although certain risk factors are recognised, the causes of shoulder dystocia are not always preventable, and often, it develops by surprise. Nonetheless, with adequate shoulder dystocia treatment, the condition can frequently be corrected in a safe manner.

Signs and Diagnosis

Signs During Labour

  • "Turtle sign": Once the baby's head has been delivered, it can seem to withdraw a little into the perineum, as a turtle withdraws into its shell.
  • Obstruction of delivering the shoulders of the baby once the head is out
  • Widening the second stage of labour or slow progress in pushing

Diagnosis

Shoulder dystocia is diagnosed during delivery from clinical findings. It cannot usually be diagnosed prior to labour, but some risk factors can raise suspicion. Labour monitoring throughout is useful in detecting abnormal patterns early. 

Causes of Shoulder Dystocia

Shoulder dystocia causes are not always apparent, but the following risk factors raise suspicion:

  • Macrosomia: Fetal macrosomia (over 4,000–4,500g) 
  • Maternal diabetes (gestational or preexisting) 
  • History of shoulder dystocia before
  • Protracted second stage of labour
  • Operative vaginal delivery (e.g., forceps or vacuum)

However, it should be noted that the causes of shoulder dystocia may be absent or unexplained, and shoulder dystocia can still develop in low-risk pregnancies.

Complications of Shoulder Dystocia

Shoulder dystocia, if not treated immediately, can result in severe complications for both mother and baby.

For the Baby:

  • Brachial plexus injury: Nerve injury to the arm
  • Fractures of the clavicle or humerus
  • Lack of oxygen (hypoxia), which can be dangerous for brain damage if delivery is not expedited
  • In unusual circumstances, stillbirth

For the Mother:

  • Severe tears or trauma in the perineum
  • Postpartum haemorrhage
  • Emotional trauma or stress in subsequent pregnancies

This renders shoulder dystocia complications an issue of high priority, which is why active shoulder dystocia management is necessary.

Shoulder Dystocia Management & Treatment

Upon shoulder dystocia, the delivery team acts according to emergency protocols. They involve a series of synchronised manoeuvres for the release of the impacted shoulder and the safe completion of birth.

Book an online appointment with Dr. Ashima Gulia for Pregnancy & Gynecology related issues.

Emergency Procedures in Shoulder Dystocia Treatment:

  • McRoberts manoeuvre: Tight flexion of the mother's thighs over her abdomen to open the pelvis.
  • Suprapubic pressure: Pressure over just above the pubic bone to facilitate the disimpaction of the shoulder.
  • Rubin or Woods' manoeuvre: Turning the shoulder of the baby within the birth canal.
  • Delivery of the posterior arm: Relieving the non-stuck arm to decrease the width of the shoulders.

They are the foundation of successful shoulder dystocia management. The faster they are executed, the better the outcome for the mother and baby. In extreme situations, a cesarean or other high-technology interventions might be necessary.

Prevention of Shoulder Dystocia

Although shoulder dystocia causes can be predicted in some instances, prevention is not always possible. Nevertheless, there are a few things that might prevent it:

  • Planning a C-section for infants who are estimated to be very large
  • Having experienced obstetric care during labour and delivery

Even with best practices, shoulder dystocia can still happen, which is why each delivery team has to receive training in the management of shoulder dystocia.

Outlook and Recovery

The majority of babies and mothers make a good recovery after appropriate and timely treatment. Minor injuries, such as temporary arm weakness from pressure on nerves, typically resolve within months or weeks. Severe complications of shoulder dystocia are uncommon if properly dealt with.

Follow-up Care:

  • Nerve or bone injury assessment by the paediatrician
  • Physical therapy for whatever residual problems
  • Maternal follow-up care and counselling for mental health, if required

Both mother and baby should have holistic post-delivery treatment so that they heal completely.

Why Choose Cloudnine?

At Cloudnine, we know that labour can be unpredictable. That is why our maternity rooms have highly qualified obstetricians, anaesthetists, and paediatricians who are trained to manage obstetric emergencies such as shoulder dystocia.

With newer fetal monitoring equipment, instant access to NICUs, and expert handling of shoulder dystocia treatment methods, Cloudnine guarantees that mother and child are in safe hands. Our multidisciplinary team is trained to minimise shoulder dystocia complications and provide empathetic care before, during, and after delivery.


Conclusion

Shoulder dystocia is a complicated and time-sensitive shoulder delivery problem, but with experienced care and prompt shoulder dystocia management, outcomes are predominantly positive. Being aware of signs early, having a prepared team of trained medical professionals, and understanding which shoulder dystocia treatment options are available can make a positive difference.

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