Cervical Effacement is the thinning of the Cervical Tissue as the body prepares for delivery.

In addition, the thinning causes a shortening of the tissue and the infant drops closer to the cervix.

This is often seen in the early portion of labor or Childbirth

Prior to this transition, the cervix has a bottleneck appearance and is quite elongated.

The length is 4 cm

Following Effacement is cervical dilation

Allows for progression of a vaginal birth


Mucus Plug

As Pregnancy continues or progresses, the cervix becomes tighter and a mucus plug is in place.

The mucus plug protects the environment of the uterus

During effacement – the cervical tissue becomes thinner and the mucus plug is loosened

It often continues until the mucus plug is passed out of the Vaginal Passage.

When this occurs it is called “bloody show



When effacement occurs – classification is done in percentage

Occurs for 0 – 100% effacement

When at 100% – the cervix is paper thin

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