Disappearance of cervix during labour is called

Appeared in: NHM UP Staff Nurse-2021 Shift-2nd

Explanation

Effacement is the medical term for the process where the cervix thins out and shortens during labor.
This process is also known as the 'obliteration' or 'taking up' of the cervix, as the cervical canal shortens from about 2-3 cm in length to a paper-thin edge.
The muscular fibers of the cervix are pulled upwards into the lower uterine segment, causing the cervix to seemingly 'disappear' and become part of the lower uterus.

Option A: Dilatation refers to the enlargement or widening of the cervical opening (os) to allow the fetus to pass through. It is measured in centimeters, not the thinning of the cervix itself.
Option B: Ripening is the softening of the cervix that happens before or in the early stages of labor. It is a necessary precursor to effacement and dilatation but is not the process of disappearance itself.
Option D: Letting down, or the milk ejection reflex, is a hormonal process related to breastfeeding where oxytocin causes milk to be released from the alveoli into the milk ducts. It has no connection to the process of labor.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiological changes of the cervix during labor as background academic context rather than a clinical decision trigger.
Assessing cervical effacement and dilatation is a fundamental skill for nurses to monitor the progress of labor. These two measurements, along with fetal station, determine the stage of labor and guide interventions.
In a primigravida (first-time mother), effacement often precedes significant dilatation. In a multipara, effacement and dilatation can occur simultaneously.
Understanding these changes helps the nurse provide appropriate patient education, manage expectations, and decide when to encourage pushing or administer analgesia.

How to Approach the Question

This is a factual recall question based on obstetric terminology.
First, identify the key phrase in the question: 'Disappearance of cervix'.
Think about the physiological changes the cervix undergoes during labor. It softens, thins, and opens.
Recall the specific medical terms for these processes.
Match the term 'disappearance' (or thinning/shortening) to the correct option. 'Effacement' is the process of the cervix thinning and being drawn up into the uterus.
Differentiate this from 'Dilatation' (opening), 'Ripening' (softening), and 'Letting down' (a breastfeeding reflex) to confirm the correct answer.

Concept Tested & Keywords

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E6 Obstetrics Williams p. 9-26

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 19-27

Practise the full NHM UP Staff Nurse-2021 Shift-2nd

Attempt every question from this paper in a timed mock, then review the full solution for each one.