The process by which muscular fibres of the cervix are pulled upwards and merged with the fibres of the lower uterine segment is known as

Appeared in: RRB Nsg. Superintendent-20 July 2019 (Shift-2)

Explanation

Effacement is the correct term for the process where the muscular fibers of the cervix are pulled upward and merge with the fibers of the lower uterine segment.
This process is also known as the 'taking up' or 'obliteration' of the cervix, where it shortens from about 3 cm in length to becoming paper-thin.
Effacement is a fundamental change in the first stage of labor, preparing the cervix for dilatation.
It is driven by the contractions of the upper uterine segment, which exert a centrifugal pull on the cervix.

Option A: The retraction ring is the boundary that forms between the active upper uterine segment and the passive lower segment. It is a result of the uterine muscle dynamics, not the process of the cervical fibers being pulled up.
Option B: Signs of placental separation occur during the third stage of labor, after the baby has been delivered. The question describes a process from the first stage of labor.
Option D: Receptive relaxation is a general physiological term for the relaxation of a hollow organ to accommodate its contents. It is not the specific term for the upward pulling and merging of cervical fibers during labor.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiology of Labor as background academic context rather than a clinical decision trigger.
Assessing cervical effacement and dilatation is a fundamental nursing skill used to monitor the progress of labor.
The rate of change in effacement and dilatation helps the healthcare team determine if labor is progressing normally or if interventions are needed.
Understanding the difference between effacement and dilatation is crucial for accurate documentation and communication among the labor and delivery team.

How to Approach the Question

First, identify the key process described in the question stem: 'muscular fibres of the cervix are pulled upwards and merged with the fibres of the lower uterine segment'.
Recognize that this describes a physical change to the cervix during labor.
Evaluate each option based on standard obstetric terminology.
Option A, 'retraction ring', refers to a boundary, not the merging process.
Option B, 'placental separation', occurs in a different stage of labor (third stage).
Option D, 'receptive relaxation', is a general term and not specific to this cervical change.

Concept Tested & Keywords

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E6 Obstetrics Williams p. 9-26

Practise the full RRB Nsg. Superintendent-20 July 2019 (Shift-2)

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