The normal rate of cervical dilation in the active phase of the first stage of labor in a primigravida is?

AIIMS Rishikesh & Jodhpur NO - 2017

Obstetrics & Gynaecology

Easy

Appeared in: AIIMS Rishikesh & Jodhpur NO - 2017

Explanation

The standard expected rate of cervical dilation for a primigravid woman (first-time mother) in the active phase of labor is approximately 1 cm per hour.
This phase of labor is characterized by more rapid and consistent cervical change as the body prepares for birth.
While classic studies by Friedman suggested a minimum rate of 1.2 cm/hr, the benchmark of 1 cm/hr is widely used in clinical practice and teaching as a baseline for normal progress.
This rate is slower than that of a multigravida (a woman who has previously given birth), who typically dilates at about 1.5 cm/hr.

Option A: A rate of 0.5 cm/hr is considered abnormally slow for the active phase of labor.
Option B: A rate of 2 cm/hr is faster than the average expectation for a primigravida.
Option D: This is the expected rate of cervical dilation for a multigravid woman, not a primigravid woman.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Rate of cervical dilation in the active phase of labor as background academic context rather than a clinical decision trigger.
Nurses use the rate of cervical dilation as a primary indicator to assess labor progress and identify abnormalities like labor dystocia (abnormally slow labor).
Plotting cervical dilation on a partograph provides a crucial visual tool to monitor progress against expected norms, facilitating timely communication with the healthcare team and prompt intervention if needed.
Failure to progress at the expected rate can be a sign of issues like cephalopelvic disproportion (CPD) or inadequate uterine contractions, which may necessitate augmentation of labor or a cesarean delivery to ensure maternal and fetal safety.

How to Approach the Question

First, identify the key clinical terms in the question: 'primigravida' (a woman in her first pregnancy), 'active phase' of the 'first stage of labor', and 'normal rate of cervical dilation'.
Recall the standard parameters for labor progression. Remember that labor progresses differently for first-time mothers compared to those who have given birth before.
Access your knowledge base for the specific rate of dilation. The standard rate for a primigravida is slower than for a multigravida.
The expected average rate for a primigravida is about 1 cm per hour.
Compare this standard value to the options provided. Option A (0.5 cm/hr) is too slow (protracted labor). Option B (2 cm/hr) is too fast for an average primigravida. Option D (1.5 cm/hr) is the rate for a multigravida.
Select the option that matches the standard rate for a primigravida, which is 1 cm/hr.

Concept Tested & Keywords

Concept Tested: Rate of cervical dilation in the active phase of labor
Stem keywords: cervical dilation, active phase, first stage of labor, primigravida
Lead-in keywords: normal rate