Is dystocia common during labour?

Dystocia is one of the common causes of prolonged or difficult labour. However, many cases are managed successfully with medical support.

Is shoulder dystocia the same as dystocia?

No. Shoulder dystocia is one subtype of passenger dystocia.

Does dystocia always require Caesarean delivery?

No. Some cases improve with medical management. However, others may require assisted vaginal delivery or Caesarean section depending on labour progression.

What Is Dystocia? Understanding the Three Types of Difficult Labour

Dystocia is a labour complication characterised by slow, difficult, or obstructed labour during childbirth. It may affect cervical dilation, the baby’s descent, or the delivery process itself. In some cases, labour may slow temporarily and improve with medical support. In others, emergency medical attention might be required.

What Are the Major Types of Dystocia?

Doctors usually classify dystocia into three major categories called the “3 Ps” of labour dystocia.

Category of Dystocia	Related to	What May Happen
Power dystocia	Uterine contractions	Weak contractions
Passenger dystocia	The baby	Size, position, or presentation problems
Passage dystocia	Maternal pelvis or birth canal	Difficulty in the baby passing through the pelvis

Power Dystocia

Power dystocia happens when uterine contractions are not strong, coordinated, or frequent enough to support normal progress of labour.

Common Causes of Power Dystocia

Weak uterine contractions
Irregular contractions
Maternal exhaustion
Prolonged labour
Overdistended uterus
Dehydration

Signs Doctors May Observe

Slow cervical dilation
Delayed labour progression
Reduced descent of the baby
Long gaps between contractions

Possible Management

Doctors may:

Monitor labour closely
Give IV fluids
Recommend rest
Use oxytocin to strengthen contractions
Consider assisted delivery if needed

Passenger Dystocia

Passenger dystocia occurs when factors related to the baby make labour difficult.

Common Types of Passenger Dystocia

Subtype	Meaning
Foetal macrosomia	Baby is larger than average
Malpresentation	Baby presents in an abnormal position
Malposition	Baby’s head position makes delivery difficult
Shoulder dystocia	Baby’s shoulder becomes stuck after head delivery

Foetal Macrosomia

This refers to a larger-than-average baby.

It may increase the risk of:

Difficult vaginal delivery
Shoulder dystocia
Birth injuries
Emergency Caesarean section

Malpresentation

Malpresentation means the baby is not positioned head-first for delivery. Malpresentation can be of the following types:

Breech presentation
Transverse lie
Face presentation
Brow presentation

Malposition

In malposition, the baby’s head is down but rotated abnormally, which may prolong labour and increase back pain during labour.

Shoulder Dystocia

Shoulder dystocia occurs when the baby’s shoulder becomes trapped behind the maternal pelvic bone after the head is delivered.

Possible Risk Factors

Larger baby
Diabetes during pregnancy
Previous shoulder dystocia
Assisted vaginal delivery

Why It Needs Emergency Care

Shoulder dystocia may increase the risk of:

Less supply of oxygen to the baby
Nerve injuries
Birth trauma

Doctors use specific manoeuvres to safely deliver the baby.

Passage Dystocia

Passage dystocia occurs when the maternal pelvis or soft tissues make labour progression difficult.

Causes of Passage Dystocia

Small or abnormally shaped pelvis
Pelvic bone abnormalities
Fibroids blocking the birth canal
Soft tissue obstruction

What Problems May Occur

Slow labour progression
Obstructed labour
Failure of the baby to descend
Increased need for Caesarean delivery

How Is Dystocia Diagnosed?

Doctors usually diagnose dystocia through:

Cervical examinations
Monitoring contractions
Foetal heart rate monitoring
Assessment of labour progression
Ultrasound in selected cases

Can Dystocia Be Managed Safely?

Many cases of dystocia can be managed safely with early monitoring and appropriate management.

Management may include:

Labour monitoring
Oxytocin-assisted labour
Position changes
Assisted vaginal delivery
Emergency Caesarean section when necessary

Treatment depends on:

The type of dystocia
Maternal condition
Baby’s condition
Labour progression

When Should You Seek Immediate Medical Attention?

You should reach out to your doctor immediately if you notice:

Severe abdominal pain
Reduced foetal movements
Labour lasting unusually long
Heavy bleeding
Sudden weakness or dizziness
Rupture of membranes without labour progression

Understanding these types of dystocia may help you prepare for labour better.

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FAQs on What Is Dystocia? Understanding the Three Types of Difficult Labour

Is dystocia common during labour?
Dystocia is one of the common causes of prolonged or difficult labour. However, many cases are managed successfully with medical support.
Is shoulder dystocia the same as dystocia?
No. Shoulder dystocia is one subtype of passenger dystocia.
Does dystocia always require Caesarean delivery?
No. Some cases improve with medical management. However, others may require assisted vaginal delivery or Caesarean section depending on labour progression.