Meconium-Stained Liquor (MSL)

What is meconium-stained liquor?

Meconium is your baby’s first stool, usually passed after birth. When a baby passes meconium before birth, it mixes with the amniotic fluid (liquor) around the baby. This is called meconium-stained liquor.

The amniotic fluid may appear:

• Light green
• Dark green
• Thick or thin

Why does a baby pass meconium before birth?

A baby may pass meconium in the womb due to:

• Baby being full-term or post-term
• Stress during labour
• Reduced oxygen supply for a short period
• Strong uterine contractions
• Normal maturation of the baby’s bowel (especially in term babies)

In many cases, MSL does not mean there is a serious problem.

Is meconium-stained liquor common?

Yes. MSL is seen in:

• About 10–15% of term pregnancies
• More commonly in post-dated pregnancies

Most babies with MSL are born healthy and well.

What is meconium aspiration?

If a baby breathes in (aspirates) meconium-stained fluid before, during, or immediately after birth, it is called Meconium Aspiration Syndrome (MAS). This can sometimes cause:

• Breathing difficulty
• Rapid breathing
• Chest retractions
• Low oxygen levels

Not all babies with MSL develop meconium aspiration.

How is the baby monitored during labour?

• Your baby’s heart rate is closely monitored
• Labour is supervised more carefully
• A pediatrician/neonatologist is informed in advance
• Delivery is planned in a controlled and safe manner

This close monitoring helps us act early and prevent complications.

Why does my baby need extra observation after birth?

• Breathing problems can appear hours after birth
• Early signs of infection or respiratory distress need to be ruled out
• Some babies may need oxygen support or NICU observation

Observation does not automatically mean something is wrong — it is done for safety.

What treatment may be required?

• Close monitoring in the nursery or NICU
• Oxygen support
• CPAP or ventilator support (rare)
• Antibiotics (if infection is suspected)
• IV fluids if needed

Many babies need only observation and no active treatment.

What is the prognosis (outcome)?

• Majority recover completely
• Long-term problems are rare
• Severe complications are uncommon with timely care

Early detection and proper newborn care greatly reduce risks.

Remember

• Meconium-stained liquor is common
• Most babies do very well
• Your baby is being watched closely by a trained team
• We are prepared to act immediately if needed
• You and your baby are in safe hands

If you have any concerns, please speak to your doctor or nursing team.