In primigravida mothers what is the average duration of first stage of Labour?

Appeared in: UPPSC 2023

Explanation

The first stage of labor is the longest, involving both cervical effacement and dilation from 0 to 10 cm.
In a primigravida (first-time mother), the cervical tissues are less pliable, leading to a longer duration compared to a multipara.
This stage is divided into a long latent phase and a more rapid active phase (mean duration of 4.9 hours in nulliparas).
The combined duration of these phases typically averages between 12 to 18 hours for a primigravida.

Option A: This duration is characteristic of the first stage of labor in a multiparous woman (one who has given birth before), whose cervix dilates more quickly.
Option B: This range is too short for the average primigravida. While some may labor this quickly, it is not the expected average.
Option D: A duration of 20-24 hours for the first stage is considered prolonged labor (labor dystocia), which is an abnormality requiring medical assessment and potential intervention.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Duration of the first stage of labor in a primigravida as background academic context rather than a clinical decision trigger.
Understanding the normal duration of labor is crucial for nurses to identify deviations and potential complications, such as prolonged labor, which increases the risk of maternal exhaustion, infection, and fetal distress.
This knowledge allows nurses to provide appropriate patient education, manage expectations, and offer timely support and interventions.
Accurate assessment of labor progression helps in deciding the need for augmentation (e.g., with oxytocin) or other medical interventions.

How to Approach the Question

First, identify the key terms in the question: 'primigravida' (first pregnancy) and 'first stage of labor'.
Recall that the first stage of labor is the longest and is divided into latent and active phases.
Remember the fundamental principle that labor is significantly longer in a primigravida compared to a multipara.
Evaluate the options based on this principle. Eliminate options that are too short (typical for multipara) or too long (indicative of prolonged labor).
Select the time range that best represents the average total duration for a first-time mother, which includes a lengthy latent phase plus the active phase.

Concept Tested & Keywords

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E6 Obstetrics Williams p. 22-41

Practise the full UPPSC 2023

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