Everything you need to know about the mucus plug during pregnancy

Noticing the mucus plug can feel exciting, curious, and sometimes a little confusing. Many believe it’s a clear sign that labour is starting – but that’s not always the case. Here’s everything you need to know about the mucus plug, what’s normal, and when you should contact your midwife or maternity unit.

Jenny Jansson

Read time: 3 m

Verified by Jenny Jansson

Certified midwife

Everything you need to know about the mucus plug during pregnancyPhoto: Preggers

What Is the Mucus Plug?

The mucus plug is a jelly-like lump of thick mucus that forms in the cervix during pregnancy. Its main role is to protect the uterus and your baby from bacteria and infections. Think of it as a natural barrier that keeps your baby safe throughout pregnancy.

What Does the Mucus Plug Look Like?

The mucus plug can vary in size, colour, and consistency:

  • Clear or whitish
  • Yellowish or brownish
  • Mixed with blood (sometimes referred to as the “bloody show”)

Tip: The colour of your mucus plug doesn’t necessarily mean anything is wrong – variations are completely normal.

When the Mucus Plug Comes Away – What Happens?

When the mucus plug comes away, it can be a sign that your body is preparing for labour. However, that doesn’t mean labour will start straight away – it can still take several days or even weeks before contractions begin.

After losing the mucus plug, you might notice:

  • An increase in discharge
  • Light bleeding
  • Mild contractions or a feeling of heaviness in your pelvis

This is all normal, but always contact your maternity unit if you’re unsure, the bleeding is heavy, or if your waters break.

Mucus Plug vs Waters Breaking – What’s the Difference?

It can sometimes be difficult to tell the difference between losing the mucus plug and your waters breaking. Here’s how to distinguish them:

  • The mucus plug is thick and sticky, sometimes streaked with blood, and often comes out in one or more clumps.
  • When your waters break, the fluid is usually clear or slightly yellowish and tends to leak continuously or in a gush.

If you’re uncertain, always contact your midwife or maternity unit for advice.

What to Do After Losing the Mucus Plug

  • Rest and listen to your body – labour might still be a little while away.
  • Make sure your hospital bag is packed.
  • Stay in touch with your partner, family, or support person.

Common Questions About the Mucus Plug

  • Can the mucus plug come away in parts?
    Yes, it’s quite common for it to come away gradually rather than all at once.
  • Is blood in the mucus plug dangerous?
    A small amount of blood is normal. If you experience heavy bleeding or pain, contact your midwife or maternity unit immediately.

Read more:
The First Days with Your Baby – Skin to Skin

Jenny Jansson

Verified by Jenny Jansson

Certified midwife

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